For what it's worth, I do remember a FATT's chip being used at the Oceanside casino (although it was a low denomination chip.) It was before I began collecting chips or at least near the start but do not remember how it was being used or the denomination, but it sure wasn't a $1,000.

I believe Mark was correct that the Fatt's casino was in Concord or somewhere up north. I was never there, but it was a real casino. Can't say that for the chip however.