In the past several players have taken on the role of a 'Dealer' playing the house and getting other players to buy in. So, what you want is quite possible, you just have to take the initiative yourself.
They would need to be able to be viewed by all players involved. It is important to be able to see what betting reserves a player has. (Now, I think this could be done another way perhaps, If each player was frisked, and then given a wallet with a set sum.) Still, there needs to be a way to deal with the pot. I can not seem to put chyen on the table directly, so we would need a way to see the amount that is in the pot for each hand. This is essential for poker. These would have to be easily regulated in the event that a player tried to add more chips from their pockets or something, easily handled by an emote.
I am really excited about this idea, and welcome any suggestions for ways to handle the issue of poker chips. If we can figure this out, there could be some awesome RP in running cash card games in seedy locations, prime targets for those looking to flex!
How about "dropmoney", or, leaving an open container (briefcase, wallet, coffee can) in the middle of the table (room) for people to "put <amount> inn <container>"?
I think the best way to figure this out is to get your character into the situation and start the game and work it out in realtime RP. Start small - just dealing and betting with one other player.
Texas hold'em is 100% possible, as are many other games. I coded cards specifically with hold 'em in mind, YEARS ago and have yet to see anyone using cards on a regular basis. Get the cards and start gambling.
Roulette, Cards, Slot Machines are all DONE ICly, however, the casino is not open because we want special events only to have gambling. IE: a casino night charity event, or something.
If you want to be a gambler, you can. Get cards and host a game. Get the players together, you are the house, you take 5%-10% for being the dealer + tips. Do it like a real casino there are ZERO hurdles to doing this with a character. The systems exist all you need to do is use them.
Nothing about money-handling or about wager resolution is coded in to the cards (or dice, whichever).
So you have a RP challenge, not a mechanical one.
I mean. Who's to say that anyone would do "dealer fees" the same way you would. The IC players of the IC game work this out.