It's a different jurisdiction with a harsher view of prostitution.

You can import one in.  Many girls travel.  I don't charge extra to see someone in San Francisco.  I can fly in for you...

It's a short drive or take a cab.  South SF is where the SF Airport is located.  SF is where the fun, food, the women are found.  Crime is high so stay inside a car, a cab, or a place, but it's a "not to miss" on the West Coast.  S.F. & NYC are my favorite cities in the US.  TER is loaded with providers in S.F.  go to the regional board for referrals.

Do a google search for escorts in san francisco.In your google results you should get the name of a big site for reviews that is used in SF.
The SF board here is dead so that is going to be a waste of time.