Loop Bar

A hidden three-floor bar in Mayfair that fits 1,050 guests and puts a different personality on every level. Loop Bar sits behind Oxford Street at 19 Dering Street — close enough to Bond Street and Oxford Circus that guests arrive within minutes of stepping off the tube, far enough down that you'd walk past the entrance without knowing it was there. The hidden-basement format is part of the appeal, and the scale behind the door is the surprise.

Loop Bar's Spaces

Each floor runs its own music, its own bars, and its own atmosphere. Groovy Wonderland is the headliner — a purpose-built 80s and 90s party room with a flashing LED dancefloor, retro décor, and a capacity of 450 standing. It is, unambiguously, a room designed to make people dance. Caspers and Opal operate as a combined semi-private floor with chandelier-lit lounge seating, an island bar, removable restaurant furniture, and a capacity of 450 standing or 180 seated. The contrast between floors is deliberate — the same event can offer high-energy retro dancing on one level and leather-booth cocktail lounging on another.

Events at Loop Bar

Corporate parties, Christmas celebrations, birthday milestones, and awards afterparties are the core bookings. The venue solves the entertainment problem that plagues many large-scale events — the rooms themselves generate energy, and the multi-floor format means guests self-select their preferred atmosphere rather than being trapped in a single environment. Caspers offers presentation capability and removable furniture for events that need a structured component alongside the socialising. Food menus span platters, grills, and seated dining.

Mayfair Location

The W1 address puts Loop Bar within Mayfair's corporate and social geography — a detail that matters for client-facing events and milestone celebrations where the postcode carries weight. Bond Street and Oxford Circus tube stations are under five minutes' walk, and Marylebone provides mainline rail access. Hire operates on a minimum spend basis, with late licence available for events that run into the small hours.