Piraña London

Why we recommend Piranha in London

When guests book a London nightclub, beach club, or pool day through MyRSVP and ask where to eat around it, Piranha is one of the names that comes back most consistently from our team. This page is written as a guide rather than as a reservation listing: the practical details, the signature dishes, the room layout, and the direct route to reserve are all here so you know what to expect before you walk in. Restaurant reservations outside Las Vegas sit with the venues themselves; MyRSVP handles the nightlife and pool-club side of the trip.

What to expect in the room and on the menu

Piraña occupies a subterranean 110-seat space beneath St James’s Street in Mayfair, designed by Strongarm Hospitality (the group behind The London REIGN and TABŪ) and opened in 2024. Chef Mark Morrans, formerly of Nobu and MNKY HSE, drives the kitchen’s Nikkei menu—a Japanese-Peruvian fusion that spans raw bar showstoppers like Seabass Ceviche and A5 Wagyu Beef skewers, theatrical centerpieces such as the 1kg Australian Tomahawk (£350), and signature shareable plates including Crispy Rice with Spicy Salmon and Grilled Octopus. Neon-lit caverns, cascading vines, and velvet booths flow across the main dining floor, flanked by a front bar for aperitivos and a floating private dining pod that overlooks the central stage—where chanting staff wield sparklers for dramatic dish unveilings. As evening progresses, live DJs spinning house and Latin grooves nightly until 1am transform the space from polished dinner into a euphoric club atmosphere. The venue stays open 6pm to 2am daily, fueled by an espresso martini lineup and experimental cocktails like the Illeberta (pisco sour with passionfruit, £18). A discreet outdoor terrace offers respite from the high-octane interior, catering to London’s party elite—influencers, executives, and revelers seeking the blur between meal and midnight spectacle.

Reservations — how to book Piranha

What we tell guests about Piranha: it is one of the London rooms worth a standalone evening rather than a squeezed-in pre-dinner. The reservation itself is handled directly with the restaurant — through their own site, OpenTable, Resy, SevenRooms, or by phone — depending on how they run their book. If you can get into the chef’s counter, bar seats, or a tasting menu slot, those are often the fastest way into the version of the room regulars are actually there for. For private dining or larger-group enquiries, the restaurant’s events or reservations team is the right first call, not a generic booking channel.

Hours, dress, and planning windows

Here is the practical layer for Piranha — the details you need before booking. Hours of operation: Tuesday–Friday 12:00 PM – 4:00 PM and 6:00 PM – 1:00 AM. Dress code: Chic and sophisticated. Heels and dress for ladies; dress shoes, smart trousers and dress shirt for gents. No ripped jeans, sportswear, caps, sunglasses, hoodies, flip-flops or shorts. Reservations tighten around Wimbledon fortnight, Royal Ascot; on those weekends, plan to book two to six weeks out depending on the seating type, and ask about chef’s counter, bar dining or private-dining allocations if the main reservation book reads fully booked. Operational note: LOCATION NOTE: Piraña at 7-9 St James’s St, SW1A (not Kensington).

How MyRSVP helps with the rest of your London trip

Booking Piranha for your London trip. The dinner reservation itself runs through the restaurant; MyRSVP’s concierge service in London specializes in nightclub and pool-club bookings rather than dining rooms. Dinner reservations are direct with Piranha. For the nightclub, pool day or beach club you’re planning around the meal, submit the MyRSVP form on the relevant venue page and a concierge assigned to that venue will be in touch with pricing, placement and the best area for your group.