I have only been to 5-6 clubs internationally but OOPS Barcelona is one of my favourites! There are a lot of young attractive people, it's not inundated with single men, and the club itself is beautiful and exciting!
The only thing that wasn't awesome was that nobody really dressed up to the theme night I went to, so I looked a little out of place.
Mostly locals, there is a lot of stuff going on! A pool that you can use in the hot weather (sadly it was too cool when I went) there are a few activities to watch, a couple of bars, a photographer, and nobody pushing or grabbing without permission. It is definitely worth the price! Not $$$ to get in the door, I highly recommend checking this place out if you're passing through Spain (or Europe) read more