5. Sound, Los Angeles
"It's built around the DJ," says Swedish House Mafia's Steve Angello, "and a lot of darker music really works there." The 8,000-square-foot club is almost absurdly high-tech, with a top-of-the-line Funktion One sound system, screens displaying 3D-mapped images, a massive DJ booth and burlesque dancers, occasionally wearing gas masks, on tall platforms shown in silhouette. And while L.A.'s dance scene is crowded, Sound is more than surviving – in part because, as Seth Troxler says, it's "the only actual venue in L.A. that features an underground vibe."
Fun Fact: Some of the wood built into the club comes from the paneling at one of Frank Sinatra's former homes.