I'm in Temecula.
If you can get away early on Tuesday, I head up to Huntington Beach for the 'world famouus HB tuesday'. Lots of riders there, some well known. I leave Temecula just after lunch, and stay there until sunset.
I'm an old noob, but enthusiastic. If you don't mind that sort of vibe, I can meet up - it'll give me an excuse to end a work day early. If we can nail down a day, I'll see if any of the San Diego locals want to meet up.
There's a smooth hockey rink to ride on right at the Temecula SkatePark / pump track. If it's not occupied with hockey-ists, it's a great place to ride.