Not only underground in music policy, Chicago's Spybar sits a floor below street level, its stripped back décor — all exposed bricks, low-ceilings and wooden floors — given a modern touch with a flurry of jet-black tables and sleek seating. As with all venues, though, what comes out the soundsystem is most important, especially in a city as steeped in clubbing heritage as Chicago.

Spybar doesn't disappoint, hence its inclusion in this poll once again. Keeping up with tradition with an up-to-date twist, Loco Dice, Marco Carola and Maceo Plex are just a few to man the Dynacord Alpha system in recent months, making this clandestine number one you should certainly spy out.