Welcome dstrkt,
I have ridden with a good twenty riders at different times, that I met through this forum.
There are riders here of every ability and rides form up from regularly at all tempos and difficulties.
Hang around and see what develops. I will bet you find some good rides and even better people.
I am riding out of town this weekend, but I hope to ride with you soon.
I am through the Caldecott tunnel from you over in Contra Costa County, but not far away. See you soon!