Keno /kiːnoʊ/ is a lottery-like gambling game often played at modern casinos, and also offered as a game in some state lotteries. A traditional live casino keno game uses a circular glass enclosure called a "bubble" containing 80 balls which determine the ball draw result. Each ball is imprinted with a number 1 through 80. During the ball draw, a blower pushes air into the bubble and mixes the balls.