First of all, don't kid yourself that chips squirreled from your winning were "free". People who say they are "playing on the houses money" forget that once the chips are in your pile, that they are then YOUR money, not the casino's.
As for the friendly and less than friendly establishments........That was my observation based on encounters with ONE "Cage Royalty" on a given day and should not necessarily be construed as indicative of the establishment in general.
Leave no stone unturned in your pursuit of chips. The thrill is in the hunt (and the occasional find)
Happy Chipping to you also,
Murph