These kinds of "mess hall tokens" were very popular in the US military in the 1970s, both in foreign deployments and at home bases. It's my understanding that they had various uses including as canteen currency but a common use, especially for tokens with no face value noted on them, was for pinball/arcade/amusement machines.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis