Do you mean a betting game (like Poker) or one where players play against the house (like Blackjack or Craps)?
Terrapin is a peculiar mixture of Blackjack and Poker that would not look out of place in a casino.
Bharg potentially also might be a suitable game as a set collector!
I was going to mention Terrapin.
There aren’t betting rules for Bharg, though. It’s more of a rummy-type game— although those can be played for money, they aren’t played in casinos.