Run by an organisation dedicated to support lesser-known live artists and DJs (in the capital of professional clubbing) and also hosting an art gallery upstairs, in this place pretty much everything can happen.
It's some kind of underground playground with different small rooms and the most unpretentious atmosphere possible. Apart from their own gigs, other people and/or organisations can rent it for their events so you will find a very diverse event line-up every month.
It is the last backyard of Brunnenstr. 10 - just walk through the end and you'll find it!