For years, this gargantuan club (advertised as Central Europe's biggest dance club) on the Old Town side of the Vltava River has been the city's mostly popular discothèque. If you happen to walk past the door around 11pm on just about any night of the week, you'll see hundreds of people (mostly tourists in their teens and twenties) lined up to get in. Part of the attraction is no doubt the easy-to-reach location, and part is probably also the eclectic mix of sounds once you get in, with separate rooms given over techno, metal, pop, oldies, funk, or whatever.  If you're new to town and looking for all-night party, this is one place to try.