I try and pay everyone the same especially for a first party. One we've partied several times it might fluctuate a little but not much. Sometimes a lucky run in the casino has me give an ATF more than usual but I tell her that in the negotiation stage (ex: hey I kicked the poker tables ass last night so heres an extra 200) but with ATFs it becomes more of an expected price and I do pretty much the same activity etc so pretty easy once I get to know the lady. For the record I have never had the " but you paid her this much" argument guess I've been lucky