Mike...

Don't think they are roulette chips. From what I understand, they were used in order to "facilitate" buying drinks, etc. for the nice ladies at the club.
My source, someone with first-hand knowledge, says they did have slots and some sort of table games in the 60's. I don't know if these were legal, since there is doubt if the Pink Pussycat ever actually had a legal Nevada gaming license at all. Hope you'll be in LV for the convention. I'll be at booth #84.

Terry