First thing, I waited almost half hour for one SP and was about to bolt but then she texted me after 20 minutes and apologized for the wait, then said I could come up soon. It was worth the wait though, so I lucked out.
Second thing is, when the SP said that housekeeping or whomever might pound on the door, just ask if you can check to see if the "do not disturb" sign is on the knob. If she doesn't want you to check, then it's probably a scam.
Sorry about your experience. Almost went to coventry for a hot blond too. Wonder if it was the same one. As the wise cowboy says (or implies at least), if it sounds too good to be true, 9 times out of 10 it probably is!