Last time I was in San Francisco (about 4.5 years ago), visiting my fellow audiophile cousin, we spent a day going to several audiophile stores in the bay area.
And it looks like they are still there.
I see:
Tone of Audio
Music Lovers
AudioVision
Future Sound
House of Music
Elite Audio
Audio Federation
While I am sure that list pales by comparison to the 70’s or 80’s, it is still pretty reasonable.