Heads/Tails coin toss:
Guess the card:
guess suit (heart, club, etc)
guess exact card (eg !betcard heartking)
Add to roulette:
red/black bet, odd/even, etc.
Add special effects and sound effects for large multiplier wins.
When on autopilot, show the next game (dice game, roulette, horse racing, etc). Show how many more rounds of current game.
Show list of "recent Jackpot winners" and size of win
Show possible prizes as incentive to play/gamble