maybe something like:
"Hey XY,
next Wednesday (30.11.) we gonna have our 2nd BeWelcome meeting in Berlin. The 1st meeting was really nice and cosy with about 8 persons. But we would like very much to see new faces and activate the BeWelcome community in Berlin. That's why we are sending personal messages to members from Berlin.
So if you are interested, feel free to join our meeting next Wednesday at 8p.m. in "Freies Neukölln", Pannierstr. 54, closed underground station is Hermannplatz.
If you can't join the meeting, but are interested in what is going on in Berlin, please join the Berlin Group:
http://www.bewelcome.org/groups/77
We will post our next activities there and set you group settings like this, that you get email updates from the group!
See you!"
Any suggestions for improving????