They named the casino 'Tangiers' for a couple of episodes (ie by showing a big neon Tangiers sign on film) and one of the episodes had Tangiers in the title.
If I remember right, those chips were only used for one scene. CSI then deposited $$ and used real Palms chips. A later scene where a woman keeled over at a blackjack table featured live $100's. Not sure if they filmed it on the live casino floor (it looked like it) or in the studio they had set up in the Palms. Gene will probably remember.