Thanks. We all owe you a drink.
It doesn't sound like her service itself was necessarily so bad, but if you're not attracted to her, that's not going to draw out her talents.
FWIW, I have walked on girls who did not meet expectations a number of times. Including at this place! Sometimes, but not always, I get annoyed looks, but I have yet to get blackballed anywhere. Maybe those places dont track #'s very efficiently. It's really not a big deal.
Not that relevant to this particular case, but in a few instances I changed my mind and a few weeks later went back and saw the very same girl I'd rejected earlier. Nobody seemed to know, remember, or care that I'd walked before. And interestingly, those were all above average sessions.