I'm not as much of a make-an-appointment type as a just-drop-in type, and I probably walk away from 75%+ of the spots I'm checking out for the first time, and often even for the second and third time. When I see that the provider is not attractive, I just say "Oh, I just wanted to take a look around, thanks!"
I've been to Crystal Spa four times, the first two times a plump, homely woman answered the door and I walked. The third time a younger attractive woman answered and I got a great nude HJ/CBJ. The fourth time was a repeat of the third.