Personally I'm not convinced there is a hard and fast rule about wristbands. I think in lots of the parties all the girls are wearing wristbands, it's just to confirm entry to the club or that they've signed in or something. I think it's arbitrary which wrist they wear it on and the pros are obvious to the strippers anyway. I think people get too hung up on the wristband debate.
Every girl (or at least 99%) of girls with a left wrist band have sex at PHGC after about party 5. In the parties post 2010 it started to be a pretty good indicator, whether left or right. The girls having sex had a wrist band on the opposite wrist of girls that just danced.
Now lately there seem to be one or two girls that participate that might be amateurs, but like Claudia Mac are pornstars either shortly before or after the party.
The girl bent over the table in the recent party looks really familiar, at first I thought she was from another party, but still can't place her for sure. When I saw part one I pulled the bottom picture because I thought she was from 2013-01-07, the girl that fucks at the end. The girl bent over certainly seems like and pro and looks super jaded, but she has the wrist band on the amateur wrist, who knows.