there is a group of english speaking climbers that get together on a semi-regular basis (normally tuesdays and/or thursdays) to climb at the DAV climbing centre in
Thalkirchen - you can sign up to the climbmunich group on Yahoo groups to get on the email list. Beginners are welcome. Alternatively you could sign up for an intro course at any of the climbing halls. The DAV's main page is here, and you can navigate to any of their halls in the area:
http://verbundklettern.de/There are a few Toytowners who get out on a more or less regular basis - I used to get out to the hall weekly however my track record as of late is a bit spotty