My take on the situation :-
I have found the odd gem on vivastreet, but the odds aren't great. There are far too many transient profiles who disappear as quick as they appear, and yes bait and switch is rife
The site is flooded with miscellaneous profiles offering outcall "party girl" services - although I don't know what that means as I certainly wouldnt invite them to a decent night out or party for that matter - I suggest their drugs of choice are crack and heroin rather than mdma, a few beers or jelly and ice cream
(what does party girl mean ANYWAY?!)
My advice is to do your research, investigate reviews and longevity of service - if you do TOFTT, be careful, leave your valuables / wallet in the car, and be prepared to walk if something doesnt feel right or you havent got the SP as described.