The game:
Keno involves betting on a single number or a set of numbers which you can choose as you wish, in the hope that your number or numbers will be selected in a random drawing of 80 balls.

How to play:
The game can be played from virtually anywhere on the casino property. Numerous television monitors keep you informed on the winning numbers. Mark your choices and the amount you wish to bet on a Keno ticket, located at tables throughout the casino and in the casino's Keno lounge. The casino provides a "Keno crayon" for this purpose.

Minimum bets can be as low as 5 cents, although some casinos only accept bets of $1 or more. The house's Keno brochures give you information about payoffs and various tickets you can play.
The house draws 20 balls at random and displays their numbers on screens, called Keno boards, throughout the casino. Keno runners, employees who take bets, circulate throughout all the areas of the casino to give you the chance to make a bet on each game. As many as six games are played each hour.

House advantage:
It varies according to the keno game played, but it's always huge: 30 percent or more. The chances of hitting one number in 80 is 0.25 percent. Keno is among the worst bets you can make.