A drinking chit was a voucher that were exchangeable for drinks, particularly of the alcoholic variety. As such, they are common on drinking bars.
The casino/resort space station Dunari's Rest utilized drinking chits that showed a drink similar to that of the Zairona Ale, inferring that the bar sold the illegal drink. Ace Azzameen was supplied one of these chits by his brother Emon Azzameen as compensation for being kicked out of the bar due to attacking the Viraxo Industries-aligned starship Enkidu. Ace later included it among his trophy collection of various items he procured during his missions as a memento to the occasion.