Possibly implement blackjack and roulette at least for single player.
The addition of multiplayer casino games and perhaps respective lobbies such as public, gang casino, cartel casino (gang aspects to casino could be taken in cool directions), private lobbies, not sure how in depth the lobby aspect would be taken. Multiplayer games could be Poker, Roulette, blackjack, rummy, others. I think this would be a great addition, you could throw in a couple ways to use diamonds to buy casino chips for each game OR maybe there is a universal casino chip shared between games? (I already have hundreds of slot chips, feel like these implementations may not mess that up, but the slots might get lit up further... but i digress... New Casino Games would be very interesting indeed
seems this is a duplicate thread idea, still check it out for brainstorming ideas for implementation!