Decked out in white with a funky triangular lighting scheme, this club has been a success ever since it opened its catacombs to the public in 2003. At the point where the Ring joins Mariahilferstrasse, literally underneath the Ringstrasse, this hot spot has a reputation for having a strict door policy, so no sneakers for gents and snazzy party attire is a must for the ladies. The layout of the space lets different moods all weld together in one open space, broken up only by lounge sofas and cocktail bars. The crowd here can range from teenagers to 40-year-olds, but if you don't want to line up outside get there before 11pm.