I know of two; I use one, which I shall describe.
Up until a few months ago, the primary working area was one room. Three massage tables separated by curtains, two massage chairs also present. Their providers are pretty good at massage. However all I get to take off is my belt and shoes and everything in my pockets. I can undo a couple buttons on my shirt to make reaching my neck easier; and the provider will remove your socks if you are having them do your feet. Most of the massage is through clothes (and a towel to keep your clothes clean) anf as I have said it's pretty good massage. About extras: you're kidding, right?
A few months ago they turned a little used waiting room into a separate oil massage room. There I take off everything down to undershorts. (The first time I offered to get them out of the way too during the massage, but was definitely told "no".) I have only had the one lady provider for this particular service. The doorway has only a half curtain, and there's a separate curtain separating the dressing and cabinet area from the massage table area. The massage does use plenty of oil, which is mostly removed by hot wet towels before you're done. The lady is not shy about lowering your waistband to get at your glutes, but that's as close to nude as you get. Again, forget extras. (On one visit she used vacuum cups on my back. [Older versions of these cups use a candle to heat the insides to create a partial vacuum; these use a mechanical pumping action. ] They were kind of painful and they left a number of circular hickeys on my back and shoulder because she used too much vacuum; I would never let her use those again.)
This place is next door to Safeway on Fry Blvd. There is a similar operation in the big Sierra Vista Mall, near Penneys; whether they added an oil room I do not know.
And that's the state of AMPs in Sierra Vista, as far as I know.
