I just went to a new one this morning (new to me). Tyson's/Vienna/Falls Church is full of places.  I've been to two, and both were nice. Neither reeaaallly scratched to itch I had (have), but they were solid. Both were clean, friendly, and skilled, bit neither were sensual.

I'm new here, but my understanding is that we're really not supposed to say too much about specific amps.  Go for one with lots of reviews... And let us know how it went.

typically you get a fair massage (YMMV depending upon the massuese), for .6 to .8 admission fee, plus tip of .4 to .6.   Sometimes (particularly if your a repeat), options are offered - DATY (.4 to .6 extra), BBBJ (.6 extra), full nudity/touching, and if they are comfortable, sometimes FS is available (usualy 1.2 extra).  There is a board not mentioned that has fairly good intel and a good pm exchange once your established.
Who is available and what they offer is in a state of fairly constant flux, though.  There are also a small group of asian indies (former AMP girls) who do not advertise and do not want their info given out...it takes a while to get into this circle (and get names/numbers), but once you do, it can offer a wonderful world of experience.  I have a regular who I see about once a month - great massage, great ending, absolute masterof the art of sensuality, but she has a stable of regulars that give her all the business she wants, and has even mentioned to me that she is cutting back from 6 days a week to 4 just to make life easier.  When she goes on vacation back to the homeland, she provides other names for "coverage" while she is gone and pre-clears you with them.