I checked the Vegas info since Ive have a litle experience there.
Pretty much the same patttern of Oriental massage offerings and pictures of gourgeous girls Ive never seen before in Vegas...not a good sign...
I think the oriental massage posts may very well be legit. These are real shoe string operations but are usually okay to very good. The other posts...uh no.
Didnt check other cities as I dont have much experience there but if you do and the pattern is similiar I think you have your answer.
Hope this helps.