Otto Zutz is not the absolute best club in Barca. It's probably not even in the top quartile,…read morehonestly. But, it was walking distance from home, and that counted for a lot.
I always had different coupons to get in (pick em up at shops and bars and restaurants all over the place, you will encounter stacks everywhere), so I don't recall ever paying a cover. The three floors of various music can be confusing but simultaneously fun, depending on who you're with and what state of mind you are in!
It's a good place to start off the night, or to go for an random night of dancing. Heavy pours at the bar for sure, but I found that's pretty typical all around the city. Easy door, no face control type BS that you might find elsewhere, and a steady crowd of locals makes it a good and not brutally expensive night out!