If you're anyone who's anyone in Barcelona, you'll have one of Otto Zutz's gold VIP cards, which allows you access to the bar and small dance area on the top floor, where you can watch all the trendy wannabes down below strutting their stuff and, if the whim takes you, go down and invite one of them up to join you on the balcony. For mere mortals and those from out of town that want to get into this great club without having to pay cover, there's TonightVIP. The dance floor is a good size and the small stage often features club dancers who pose and pout almost as much as those upstairs. 
It used to be one of the most exclusive clubs in the city, now it's lessened up a little bit, but you will still find a good crowd in there.