will leave that up to the ladies.  What say you girls?

Swim

Check with the provider and the AMP and see if the later is willing to give, and the former receive, a reference.

In fact, the first gal I met on the internet took as a reference the scheduler for the MP I frequented for years (and still do).  That's back when the only providers I knew were not on the net, so the provider had no way of checking them out.  At least the MP has a phone number and a business listing, so she felt OK with it.

The worst thing they can do is say no.

I'm sure it varies from city to city, place to place, but it has been known that some members of New York's Finest (NYPD) used the services of New York's Finest (AMPs), even in uniform! That can have a chilling effect on attracting paying customers. I read an article in the NY Times around 6 years ago that one AMP had so many cops traipsing in and out that they had to open up a second place across the street - no cops allowed!  

There are still a few places located right next to Manhattan precinct houses. That makes it impossible to double park without getting a ticket while you run in for a quickie.

And someone pointed out the language problem. Very true, compounded by the culture clash. Most mamasans I know of wouldn't know what I was talking about (reference) -- they can barely give me the correct street address -- or would pretend not to know what I was talking about or would just completely screw it up.