Schönhauser Allee 182
 
U-Bahn U2 to station Senefelderplatz or station Rosa-Luxemburg 
U-Bahn U8  to station  Rosenthaler Platz

Tram M1 or M12 to Zionskirchplatz tram stop

 
Just around the corner from Fehrberliner Strasse.
Go in the gate, then in the big wood door at the end of the building on the right.
Up the stairs and then the room on the right.