It's on the second floor where it used to be a hostel. Really nice place, many events and great music. Cheap beer, and the best thing it's hidden. Here you can go before hitting some club or stay for the whole night, enjoy a really nice ambient.
Go and enjoy yourself with great music in a nice environment. The place still feels like a hostel, it's full of people, the drinks are cheap, a place to feel relaxed.
Look on fb for events, sometimes there are small concerts that can be really good.