One thing you will soon learn about Barcelona is it’s a city that doesn’t sleep. Catalans eat late, drink late and go out very late. At the weekend don’t be surprised if night clubs are pretty much empty until at least 1 or 2am, and they go on until about 5 or 6am.
More information:
http://www.timeout.com/barcelona/music-nightlife
http://www.timeout.com/barcelona/bars
http://www.barcelonanightlife.com/nightclubs.php
http://suitelife.com/2013/06/13/rooftop-bars-in-barcelona/
Other videos:
Video: © onvidtur
Source: https://www.youtube.com/watch?v=ICPzW7kdKKM