According to this website:

https://www.google.com/search?q=oasis+card+room+ridgecrest+ca&oq=oasis+card+room+ridgecrest+ca&aqs=chrome..69i57.7886j0j7&sourceid=chrome&ie=UTF-8

When they were open - it was for limited hours on some evenings (I could never figure out which ones) - very few people came in to play. One glorious evening, I happened to hit it right and was able to purchase a few chips from the lady there (who appeared to be the owner, dealer, manager, and only employee of the casino). Wish I'd gotten a few more - went back a couple of times only to find the room closed. Last time which was quite a few years back, I seem to recall the room being locked and the bartender telling me the card room was gone. (The card room was a back room to a bar which I think remains open.) All my extra chips were sold, long ago.

Oasis chips are now quite rare and difficult to find.