Although Barcelona runs rampant with bars and nightclubs, it's hard to find any as 'happening' as those in Barceloneta. What used to be an old fisherman village has both maintained it's authentic charm while keeping up with the times. In this neck of Ciutat Vella (Old City) you can find hole in the wall dive bars and clubs, ones that you'd miss if you didn't know where to look, as well as shishi, over the top, have to be on the VIP list in order to get in type of places.
Barceloneta also has the advantage of being ideally situated along the water, which is home to a variety of extremely fun, dance until the sun comes up, night clubs. Places like Shoko, Catwalk and CDLC are renowned for their guest lists, high heels and VIP crowd. If you're looking for something more low key, inside Barceloneta, although there aren't tons of nightclubs, some of the bars stay open quite late and are great places to enjoy a few drinks, mingle and spend time on the terrace. And if you want to switch up the vibe, the trendy and very lively Born neighborhood is a ten minute walk and full of fun bars and discos.