a Gold Coast roulette, sans the "ROULETTE" on a hot-pink chip!

As for your 25 cent question, I recall that their sister property (The Orleans, which has only been open since 1996) offered 50 cent roulette late night, when things were slow. It is quite possible that the Gold Coast offered 25 cent roulette with chips used at the $1 level now.

Do you need a scan of the hot-pink?

Jim