Every second monday each month we meet at Atzinger's for a very informal Stammtisch (beers and schmoozing). This meeting is for everyone who wants to get in touch with other game developers in Munich. We don't have a set topic or any other formalities. Just show up, sit down with us and enjoy the company. Oh and you're always welcome to bring your finished games, prototypes and friends. =D
You can find the web site for the Stammtisch at http://www.gamedevmuc.de/.