In my experience it seems that 90% of AMP have the typical HE but I have never had anything more. What do you think the percentage is for FS?

in order to get to that level.

If you're a regular and find your provider attractive, I'd just ask if that's on the menu. Always look for reviews and see if there's buzz about the AMP spot rather than just hoping to get the right sign.

Here in the Washington DC area there are counties where the FS option is rare (near 0%) and other counties where it’s pretty common (over 75%). There is a review site dedicated to massage parlors that will give you all the intel you need on what’s available and where. It’s not cheap though. Sign up for a month, educate yourself then cancel.

But you have to know how to find them.  
There are sites dedicated to only AMPs and their offerings. I'd start there.

I'm petrified of some cops busting in and catching me with my pants down. I live in the San Gabriel area of So Cal and there's a shit load on massage joints on every corner. I read where guys are getting FS for $120-160 tips.  
I'm sure there's nothing to really worry about but man... Maybe I'm just not cut out that this sort of adventure

Goodness you live in a land of plenty when it comes to high output AMPs! The SGV used to be my playground and they were tons of great amps in El Monte, Rosemead, Monterey Park just to name a few places. I've never had the fear of getting caught in a raid that most men have because I always figured I'd get out of jail free if a spa I was at got busted because I could claim ignorance of anything going on and I would probably not be suspected of any shenanigans so I've always felt pretty cavalier about it.  
Nowadays when I'm in the area I'm more likely to hit a strip club than an amp, but having jittery nerves is pretty normal for most until they've had a few experiences under their belt. And yes.... it's not the hobby for everyone. But if you do get past the jitters it can become quite addictive 😁

Besides tbe obvious..between us.
Cops catches me banging away, butt ass naked … I’m probably in the slammer
Cops catches you with a masseuse going down on you, he’s probably asking to join or collecting digits..🤣
But yeah , the SG Valley is LOADED with AMP’s

Went to my first AMP in close to 25yrs
My question…How do you guys fuck in that narrow table?
Can’t do the “Flip to mish” and other positions without breaking stride.
I guess these FS AMP’s aren’t for me
The struggle is real