If you want to have a relaxed evening out dancing head to this venue in the beautiful Kulturbrauerei building complex in Prenzlauer Berg. You don´t have to pretend to be especially cool or hip here. The music is typically mainstream pop/rock and the prices are affordable for the area.
Having to worry about dress codes and door policies when going out is definitely an issue in Berlin. In some clubs you can never be sure to get in, even when you dress exactly like the last time. It´s good to know that very probably here you won´t have trouble with that.
The place gets packed Friday and Saturday while on other days it can be quite empty.