Casa Mono Reservations: OpenTable, 30 Days Ahead at Midnight

Casa Mono is Andy Nusser’s Spanish tapas bar at 52 Irving Place, on the corner of 17th Street, just east of Union Square. It opened in December 2003 and has been hard to get into for most of the time since; The Infatuation calls it “a consistently tough table since it opened in 2003.” It holds one Michelin star in the 2025 guide, and the room is small: 13 tables and 15 bar seats, per the restaurant, with the bar facing the plancha. This guide covers how the book actually works as of November 2026: the platform, the hour new dates open (which is not what the trackers say), what was left on the calendar when I looked, party size, the dress code question, and how walk-ins work with Bar Jamón next door.

Is Casa Mono on OpenTable or Resy?

OpenTable. The Reservations form on casamononyc.com is an OpenTable widget, and I found no Resy listing for Casa Mono. You can also call 212 253 2773, the number on every page of the site. The OpenTable listing is simply “Casa Mono,” and its details name three dining areas: Casa Mono indoor seating, Bar Jamón and the sidewalk. The Infatuation’s advice on the sidewalk is blunt: “while you can generally reserve a seat outside, you shouldn’t,” because the point of the room is watching the open kitchen work. If you have only booked on Resy before, the differences are in Resy vs OpenTable.

When do Casa Mono reservations open? 30 days ahead at midnight

The restaurant’s website does not state a window, but OpenTable does, on the listing itself. When I asked it for a table for two on December 2 at about 11:30pm on November 1, it answered: “Reservations for next 30 days open on November 2, 2026 at 12:00 AM EST.” Under that: “Bookings are scheduled to open 30 days in advance at 12:00 AM EST.” OpenTable’s own blog post on Casa Mono, from June 2026, says the same thing. I checked again at 12:01am on November 2, and December 2 had opened, with 6:30 to 7:30pm all bookable for two, while December 3 now said it would open “on November 3, 2026 at 12:00 AM EST.”

That contradicts the trackers, which do not agree with each other either. AutoRes says Casa Mono releases tables 31 days out at 9am, and that they are “usually gone within seconds of release.” Scoopd says 31 days at 10am. Neither matched what I saw. The window is 30 days and the hour is midnight, on OpenTable’s word. Follow the 31-day, 9am rule and you arrive fifteen hours before your date exists, find nothing, and by 9am the next morning it has been open for nine hours.

The date math for a real night: say you want dinner on Saturday, December 12, 2026. Thirty days back is Thursday, November 12, so be on OpenTable at midnight as Wednesday, November 11 turns into Thursday; OpenTable itself gives that date for December 12. One date opens each night. If December 12 is not bookable at 12:01am, look again the following midnight rather than refreshing for an hour. The general rules for this platform are in when OpenTable releases reservations.

How fast do tables go? What the calendar showed

Slower than the trackers suggest, unless you want 7pm on a weekend. OpenTable shows the few times nearest the one you ask for, so I asked for 7pm for two on each Saturday in November, on the night of November 1. Saturday, November 28, four weeks out, still had everything from 6:30 to 7:30pm. Saturday, November 21 had 6:45, 7:15 and 7:45pm, plus 5:15pm. Saturday, November 14 was down to 4:30 and 4:45pm or 9 and 9:15pm, and Saturday, November 7 to 4:45, 5pm or 10:15pm. The newest date, Tuesday, December 1, still had 6:30 to 7:30pm open at 11:30pm, almost a full day after it opened. The prime Saturday hours go two to three weeks out; the edges of the evening last much longer.

Casa Mono serves straight through, noon to 11pm every day, per its site and OpenTable, with no break between lunch and dinner. That is the other easy door: the 4:30 and 4:45pm tables that keep turning up above are part of the same all-day service, and an afternoon booking puts you in the same room, at the same bar, with the same menu.

Party size, groups and private events

OpenTable takes parties of up to six. Ask for eight and it replies, “For parties larger than 6, contact Casa Mono directly or explore private dining.” Six is possible on a weeknight: for Tuesday, November 24 it offered six people 4:45 or 5pm, or 9:30 or 9:45pm, and four people 5 or 5:15pm, or 8:30 or 8:45pm. For anything larger, the restaurant’s private events page names Events Manager Valeria Fuentes at events@casamononyc.com or 212 253 2773. It describes Casa Mono as “a forty-seat Michelin-starred full-dining restaurant” that can host up to forty seated, and Bar Jamón around the corner as able to seat 22 or hold 33 standing.

Cancellation policy and the card

Casa Mono does not publish one. Its website says nothing about deposits, cards or late cancellations, and the public OpenTable listing showed no booking terms either, as of November 1, 2026. So read the booking screen before you confirm, since that is where any card hold or late-cancellation fee would be spelled out, rather than assuming another restaurant’s rules apply. Our restaurant cancellation policies guide covers how these usually work in New York.

Does Casa Mono take walk-ins?

The restaurant states no walk-in policy. The way in that reviewers describe runs through the bar next door. Bar Jamón, at 125 East 17th Street, is Casa Mono’s sister wine bar, which The Infatuation calls “basically Casa Mono’s waiting room.” Its review of Casa Mono, updated in 2024, gives the play in one line: “put your name down early, and wait for your table at Bar Jamón, their sister bar next door.” Bar Jamón is small itself (“twenty people in there means it’s a full house”), but it serves the same wine list and its own plates of ham, cheese and conservas, so a wait there is not wasted. If you try it, go as one or two, and aim for the hours that stayed open online when I checked: the afternoon and after 9pm. More walk-in options are in NYC hard restaurants that take walk-ins.

Is there a dress code?

Not one the restaurant publishes: its website says nothing about dress. OpenTable’s listing gives the dress code as smart casual and the dining style as “Casual Elegant,” so there is no jacket rule to worry about. The restaurant’s own About page borrows Tasting Table’s line for the mood: it has “the feeling of a ‘night out’ without the pretension.”

What to order at Casa Mono

The menu on the restaurant’s site is one long list of small plates. The restaurant says its razor clams and bone marrow have “garnered a cult following”; the bone marrow now comes with trout roe, horseradish and everything bagel spice. The Infatuation calls the creamy eggs with sea urchin, ancient anchovy oil and walnuts “a signature dish well worth its fame,” and the confit goat with avocado queso and Sicilian pistachios its favorite main. Bacalao croquetas with orange alioli, patatas bravas and arroz negro round out a table. The wine list, shared with Bar Jamón, runs to nearly 600 Spanish bottles; The Infatuation put the range at $60 to nearly $4,000, with glasses from $12. For two, take the restaurant’s own advice and ask for the bar in front of the grill. If Casa Mono is full, its Gramercy neighbor is covered in booking ahead at Gramercy Tavern, and the hardest restaurants to book in NYC list shows where both sit.

Watching Casa Mono’s OpenTable calendar

A Casa Mono table appears in two ways: at midnight, thirty days out, or whenever someone cancels. SeatSwiper watches OpenTable, Resy and SevenRooms, and Casa Mono books on OpenTable, so one watch covers the midnight release and the cancellations after it. Set your date, party size and time range once, and it books the table the moment one opens or someone cancels, without you awake at midnight. It books on your own OpenTable account, in your name, for your own dinner, and nothing is resold or transferred. It can’t get your account banned, because it books on your own account and checks every few minutes, never nonstop. The first booking is free. After that it is a flat $5, charged only when it actually books the table, with no subscription. A cancellation watch on a date that is already full costs $1 to start, charged when the watch begins even if no table ever opens; that $1 is not covered by the free first booking and is not refunded, and the same $5 applies if the watch wins you the table. The honest limits: it only works on those three platforms, it needs your OpenTable login to book in your name, it can lose a race for a single table, and it cannot put your name down at Bar Jamón for a walk-in or arrange a group of seven or more.