Keno The keno casino is played with cards bearing numbered squares; a number on the card may be marked when an announcer selects and calls that number from a randomly selected pellet. The standard version of keno is similar to lotto or bingo except that the numbered balls are rolled out of a container called the keno goose.

The most widely played form of keno is a variation called race-horse, or Nevada, keno. This version of keno is played in gambling casinos, in which any number of players, even one, play against the house. In racehorse keno the player is given a card with 80 squares numbered from 1 to 80 in rows of 10. The player may bet on any number or numbers but not more than 15, marking them on his card or ticket, which a clerk then records as the player pays out his wager for each number selected.

The keno numbers are also printed on 80 individual ping-pong balls, which are either blown around in a large clear plastic sphere, or spun around in a wire bird cage. As each ball is selected, the winning number is electronically highlighted on the keno boards throughout the casino.