The Art Group

This sounds like a neat group, with branches all over the US. I originally found them via a listing on CraigsList.

Click on Events and then scroll to the bottom for California listings.

From the web site...

THE ART GROUP.....(TAG)..was founded in spring of 2002 by Leslie, a psychologist, author and college professor. The art group, hopefully,will be a process for its members that will continue to beneficially change and grow as it facilitates change and growth in members.

ACTIVITIES: Members meet one weekend afternoon per month to go to galleries and museums and then for coffee to chat. During the month a few of the members meet for additional activities such as openings, private tours and art fairs, some of which are organized by members.