Our local clubs in Santa Clara County are just for looking, talking, flirting, and sometimes talking dirty. I have loved them for this, and mostly they are not too expensive.
San Francisco clubs should be anything goes. But in my own more recent experiences, many of them are clip joints. They use arbitrary rules to limit the front room contact. Of those that offer FS, I've always been suspicious of the way they do it. Too much money, not enough time, not really GFE.
So AMPs have been my place for FS. Usually it is not intended to be a GFE offering, but I have found ways to improve the chances and I have had countless mind blowing sessions. But no, it is not a guaranteed outcome. But decent FS is almost always available, and at times I've made heavy use of the AMPs in three different counties. I did this so much, and was so often running into girls who knew me as the new shops were opening. that they suggested that I was addicted. I agreed with them.
SJG