Airgas is one of the cheaper places in San Jose but the one on Monterey Rd. is closed on the weekends. I end up getting mine at Carbonic Services in Santa Clara as it is near my work, they are a few bucks more expensive.
It's just a card room and there's some quirks like you're not really betting against the place, but rather a person who's sitting next to the dealer. You also have to ante a dollar every time which can add up (more so on fast games like War or Black Jack). They have good foods and drinks and a nice sports bar so it's worth going to when a game is happening (like Warriors or now Sharks). It's not a full casino so no slots or anything like that, just strictly card games.