Keno

The ancient Chinese played a game that was very similar to your local lotto, and keno is based on the same concept. 
In the game of keno, a computer randomly draws 20 numbers from a field of 1 through 80. You place various bets on which numbers will come up, and if enough of your numbers do come up, you win.

Casinos vary wildly regarding the possible bets you can make and the payout odds for bets, but the most common bets are 6-, 7-, 8-, 9-, and 10-spot bets. If you play a 6-spot game, for example, you mark six numbers on the ticket and hand it in. Just like with the lotto, if your six numbers come up, you win. If five of your six numbers are selected, you also win, but substantially less than you would have with all six numbers. Four matching numbers will likely pay even money, and three or fewer matching numbers loses.

Keep in mind that you have to cash in winning tickets before the start of the next game, or you lose it all. Also, before you go dreaming about hitting the big jackpot, know this: The house advantage on keno is greater than in any other game in the casino.

You can change your betting strategy so that this fundamentally simple game takes a complex turn. For example, you can make bets involving groupings and splits. However, this is much more than you need to know if you're just looking for something to do while waiting for your drink. Just pick your lucky numbers and go. The best advice we can offer is that betting on fewer spots means better odds of winning. It's a lot easier to get 6 out of 6 than it is to get 10 out of 10. Plus, if you get five numbers on a 6-spot ticket, you win something, whereas five numbers on a 10-spot will probably get you zippo. You won't win as much on a lower spot ticket, but you're likely to win more often.

Where to play.

Here is the list of some online casinos where you can play Keno:

Online casino	Software	Currencies	No Download	Languages	Notes
Cabaret Club	Microgaming	Euro, GBP, USD	Yes
Casino Del Rio	Playtech	AUD, CAD, DKK, Euro, GBP, NOK, SEK, USD, ZAR	Yes
Cherry Red Casino	RTG	USD	Yes
Tower Casino	Ongame	USD	Yes