I live in SF as well. Petsmart has cheap obedience class. I know some people question Petsmart training; however, I personally know the two trainers at the Daly City Petsmart, and they seem to do a good job. This is an unbiased opinion. You might want to go check it out.
***Edited By: archimedes on 7/21/2007 4:20:21 AM*** Reason: edit.