Yep, there are tons of S3 guys in the LA area as well as down in SD. Few group rides go on from time to time. I am actually going to be setting up a ride soon, from the shop to Malibu or the crest!...if you down to go PM me.I live near Thousand Oaks. Yes, there are so cal S3 riders. In fact, a group of us just go together last weekend for a ride around Malibu.
However, I haven't seen any group rides post up on this forum.