There is more than look. I happened to meet a few of them, Ginger Lynn, Sunset Thomas, Asia Carrera etc when they went on tour and came into town. (the classic ones)
Some don't show up until showtime around 7-8 p.m.(or even 9 p.m.) but some stars will sit down and you can buy them a drink and talk and get to know them. You can spend 40-80 bucks for 2 songs and they will dance for you. (some will but no touching!)
I usually bought 2 DVD/videos, posters etc and took couple pictures with them. And they signed their auto.
Most of them seems very nice. It is just a business "BUT" personality and friendiness trumps over "look" !