Crystal Club

It's a great place for partying, drinks are very reasonably priced and you can drink out of jars. They often host worthwhile events and lectures as well.

Cozy place, hipster-ish but not to the point of feeling uncomfortable. Serving beer in marmelade jars is not really necessary, but as long as the beer is good.
Saw a nice concert there, so worth checking out!

Wardrobe very small. If a lot of people, then from the second floor stage to see practically impossible (during the concert).