I haven't looked at Donuel's links, but I suspect they're much like what you'll find if you search for "Tantric Goddess." (Try Google Image Search, and of course turn off the "Safe Search" filter.) Possibly there are "degrees of blatent," but I'd think not much.
I'm told by friends in the transportation business that Las Vegas has come up with a sort of new one to prop up sagging casino revenues. Las Vegas is, I think, in the only Nevada county where prostitution is NOT legal. (A few cities have local laws.) It has been determined that it's only the "making a contract" or "paying for" that's prohibited. If you call to a phone number outside the county and pay in advance by credit card, your selected "service tradesperson" can come to your "place where maintenance services are required" and it's perfectly legal. If you decide you need additional "services" your "worker" must leave the county, you must call again and make payment in advance, and the "service" is performed when the worker returns.
You must originate the phone call, since a call originated by the "worker" could be construed as "soliciting for..." which is also illegal in that county.
Phone numbers readily available on the nightstand at your hotel, or at the nearest truck stop. (At some better hotels you might have to ask, or look in the free "entertainment newspapers.")
I'm told it's much simpler in Reno, Nevada; although the casinos are a little less fancy.