"Im Viertel" in the Nauwieser Viertel, the address is Blumenstrasse 17, 66111 Saarbruecken.
Here you can find a map:
http://sbserver.saarbruecken.de:4680/query?STR=Blumenstra%DFe%20%28Kernstadt%29
The meeting is open for everybody, whether you speak German or not. You can also bring your friends, of course: everybody's welcome. If you can't attend this time because of the Eurographics conference, bear in mind that on the 18th there'll be another chance. The regular's table takes place every fortnight.
It's basically open to everybody, but YOU are especially invited
because
a) you are studying the German language, or
b) you are a German native speaker, or
c) you are looking for an opportunity to get to know some of those Germans you've been seeing running around everywhere, or
d) you have always wanted to get in touch with that certain exciting person from AG whatever and didn't know how to do it - now you can: invite them to join you at the regular's table! :-)
Whatever your motivation is, do come. The more people we are, the better. And do bring your friends. :-)