This is the game that most of you will encounter when eating in the casino coffee shops. It is a great way to win some extra money and perhaps pay for dinner unless you've already figured out how to stay and eat for free. Keno is similar to your state lottery or lotto. You have a card that has 80 numbers on it. 20 numbers are drawn and you may pick up to 15. Your payoff will depend upon your initial bet and the number of digits picked.