One of the things we have to get used to is that there is tremendous turnover in all of the spas. It seems like about half of the girls you visit aren't there a year later. Some of them can be found somewhere else, but some disappear forever.
On the flip side (pardon the pun), new girls show up on the roster of every spa with great regularity. There are always exciting new options to try out. I remember identifying a girl I really wanted to see, and then she disappeared from the roster before I did, and so I went to see somebody else and had the most incredible time with her.
You could go to a spa twice a week and never have to see the same girl twice.