I found a life drawing sketch group in San Diego on Sunday nights from 7-9 PM. No instructions. It is at the San Diego Art Loft on Tripp Street. Only costs $12.00 and can be accessed through the “Meetup” website under “Arts” category. Check it out! Great fun!
Also, there is a Quick Sketch art class in Vista that has an instructor. It includes a series of 1 – 5 minute sketch times with a 20 min thrown in. It meets on Tuesday nights, 6:25 – 9:25 PM. There is a requested $15.00 donation for the model. You can find it in “Meetup” as well.