All Bar One The O2 in London recently underwent renovations and can now accommodate up to 500 guests over two floors. It has a sleek VIP lounge that can hold 250 people on the top floor, which includes a cocktail masterclass table and three private areas. As it is located next to the main arena doors, it provides easy access for artists without going through public areas. The venue can host a variety of events including after show parties, business lunches, private dining, Christmas parties, and client entertaining. No event is too big or small for the space.