San Francisco Auto Repair Center (415-285-8588) at 611 Florida St (at
Harrison) has offered classes and working space/tools for
"do-it-yourselfers" for years. I used them many years ago (~20 years?!)
before I had space and tools for auto work. I don't know what level of
classes or work they offer these days. Give them a call or stop by. I'd be
curious to hear what they're like these days.

Another good reason for dropping by this place is that Potrero Brewing
Company is now just 1/2 block north of them. Great beer and food.

-Dave O.
S.F.