I’ll try to keep this thing up-to-date when more stuff appears. Feel free to recommend things in the comments and ask about things you might be interested in…
24/07 - 26/07, bike ride Leipzig/Berlin: some people are planning to ride polo bikes to Berlin from the Peppermint tournament in Leipzig a weekend before. If you are interested in joining it, say hi in this Poloverse thread.
29/07, Critical Mass: If you still have energy, follow some techno blasting DJ bikes around Berlin at night. Starts at around 8 pm and goes on and on.
03/08, Rookie Night: we have a rookie night every first Wednesday of the month. If you are still around on the 3rd of August, show up to get to know the new crop of players! We also play pickups on Mondays and Tuesdays, when there are 6 players interested.
Check this list often for updates.