Is it safer (from a getting busted perspective) to visit a sf amp (the cities seem to tolerate/put up with them, some have been around for years) or an amp in some smaller south Bay Area cities (for example - milpitas, Fremont, Sunnyvale, mountain view, etc
Indeed, wasn't there a story a couple of years ago about a City official (maybe even the mayor?) in San Francisco who joined an "inspection" along with a press and walked in on a guy getting his equipment polished? I don't remember what happened to the John but I'm sure it wasn't good.
Also there are places that don't have buzz-to-enter doors and no one upfront full time hence LEO can easily walk right in and immediately start opening doors. I've heard of a guy who had that happen to him during a trafficking inspection. Only a massage was in progress for him - he was questioned for a bit and had his info taken down. That said there is a place I go to that is strictly legit hot tubs / sauna and CMT only that has a) buzz to enter front door to keep riff-raff street bums out, and b) latches on all doors to stop people barging into the wrong room. So I think it isn't necessarily a sign of anything sketchy going on if a places has both buzz to enter and locks on rooms.
Mind you a latch on a room would not hold up to a forced entry effort by energetic officer - but I'm thinking sound doors being smashed in would alert other Johns to flip-n-cover, and masseuses to cover up. Even if you cover up hopefully there isn't any other hard to explain incriminating evidence in the room...