I think it would be awesome to have games like roulette where you can see the other bets people are placing at the same time as you (Roulette wheel would spin every 15-30 seconds). Then you could have an option to switch to private if you don't want wait for the wheel to spin. Also you could have a blackjack table where multiple people can sit down at the same time (You could just implement 5 decks instead of 1).
I was thinking of doing this once. Except a live wheel of fortune but it is very similar. The wheel wouldn't spin because if there was multiple it would mess up the game, but my idea was that there are different color balls assigned to addresses