You're literally 180-out on the Beltway.  There are several locations in Greenbelt and other locations in PG county that are quite dependable.

Does it have to be an AMP, or is what you're really looking for is a CMT-quality massage and a good fuck before/after? I can help with the latter.
 
I have recent AMP experience: When I respond to an alluringly raunchy ad and get house fees in response, I know it's a FS AMP. I actually tried one of them recently and she couldn't have provided a massage as good as your last girlfriend. So if the massage is important, I suggest you try another approach. I could help you there.