The culture center Danziger 50 (at Danziger Str. 50 in Prenzlauer Berg) hosts diverse lectures and discussions in Esperanto on every 2nd and 4th Monday of the month. Read about the program at http://www.esperanto.de/bb/eo/ubersicht/danziger-50/ .
People interested in Esperanto can get an informal introduction before/after the main program.
