My favourite bar of the many around kreuzkölln is Bellman. After its sudden closure and reopening it underwent some changes and is boycotted by some of its former patronage, but for the less principled like myself it’s still a good place to go and they do pull the best Jever in Berlin.
Haus der Materialisierung is an association of various local initiatives and institutions that research, practice, and work on the topics of sustainable management and climate-friendly use of resources.
...and it works!
Best record store in Berlin. A great selection of Rock, Folk, Indie, Wave, Industrial and especially the huge floor dedicated to House and Techno Records. Staff are typical Berlin-Style - not very friendly but very knowledgeable.