They have local chapters -for you in Calif. -
http://www.ytca.org/closangeles.htm and
http://www.ytca.org/cnorthcalif.htm I did not know which one you might be closer to, so I sent both. Then check out AKC site for the local all-breed or toy club closest to you.
You are lucky - I do not have a local YTCA club in Georgia at all. Think of the chance I would ever have to become a member - 0! I was a member of Goldcoast YTC years ago when I lived in Florida and loved the meetings. I would look forward to them every year and especially our Fun Matches and Holiday parties! Wow!!
T.