Every second Tuesday there is a special cinema-experience. In the backyard of the Brigittenstraße in St Pauli you can find a very small cinema called B-Movie. The Dokumentarfilm Salon shows selected documentary films there, often followed by a debate with the director or other participants. The cinema has only 75 seats and there is a little bar where you can buy some snacks and drinks.
Films could be German so you should check the program on their homepage if you are not German. All films are carfully selected and refer to interesting, political and social topics.
If you come to late and it might be too crowded you could stay at the bar for a chat. What is interesting on top: you can rent the b-movie for your own private cinema show.