I wish I'd know about this place earlier in the summer! For the bargain price of 3 euros, you can become a member of the Antic Teatre of Barcelona, an old underground theater in the middle of Barcelona's La Ribera neighborhood. The Theater is currently under renovation, meaning there are no upcoming works. Honestly, the only good reason to join now is to access their huge, tree-shaded outdoor patio bar with cheap (San Miguel sponsored) beers. The club boasts 6,500 new members in the last two years, and it's not hard to imagine why.

note: this is not my cool picture. It was the result of a google image search, which led to to this guy's really cool collection of Barcelona photos on flickr.