Rayko is a wonderful place, run by dedicated people. I do all my silver printing there. They have an 8" X 10" enlarger, full colour darkroom and my favourite- darkroom #2, private darkroom, 2 enlargers and music. All for the low, low price of $15 per hour.
It's also 3 blocks from SF Moma, 3 blocks from Photographer's Supply and about 5 blocks from Gasser's. Then there's also 49 Geary about 10 mins. away.
Come on up some time Art, I'll give you a photo tour!