A free discussion group that has been meeting for over 14 years. We began discussing philosophical topics but branched out to discussing anything of interest to our members. 
Each Saturday a member volunteers to give a presentation on a topic they think will be interesting and or informative. There are no taboo topics. We don't sell or proselytize.
Our main rule is to be polite and respectful of other members whether we agree or not. 
It is totally free. All you have to do is show up.