Holzmarktperle is a nice spot that takes Bitcoin (via lightning).
The next Bitcoin Socratic is on the 8th at c-base, which is it's own attraction. There's other meetups too: 
cc @Emzy and other Germans
Meetup
Bitcoin Lab Berlin | Meetup
It's all about Bitcoin! Longest running Bitcoin meetup in the world. Have fun socializing and learning more about Bitcoin.
