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: https://www.meetup.com/bitcoin-lab-berlin/

cc nostr:npub1ftd5lukuw2alrak6r87ppyqg5fgp8jpheacjq95h97kszkce2yls5dv5jq and other Germans