For the practice, please see tokenism.
A token was a coin-shaped object that enabled one to play on arcade games.
Quark's used gambling tokens. (DS9: "Defiant")
In 2382, once some Acamarians on Starbase 80 learned that visiting USS Cerritos crew wanted to go to the starbase's arcade, they offered up some free tokens. (LD: "Starbase 80?!"