You should know what to expect when you go to Flirt Spa. You'll get a pretty girl, kissing 80% of the time, body slide, DATY 80% of the time, digits 90% of the time, extras maybe 10% of the time (I'm guessing here; I've never had any but apparently a few guys have).
It's the place I have been to the most, mainly because Gigi is there, and June used to be there. I like that they're not so busy that the girl you want to see is hard to book. Also, given that extras cost extra, a trip to Flirt often ends up cheaper than a trip to Premier, although I like the 60-minute sessions, so I'm out of pocket $240 for a visit, while a 40-minute Premier session comes to $150, leaving room for a nice tip almost every time... but a shorter session, too.
And Premier does have Aaliyah and Jennifer...
Pretty girls are awesome.