Tribal casino operators typically replace 15 percent to 20 percent of their games each year, Doyle said. But you may only want to change out 10 percent of the games, each situation is different. There's no magic formula. Some of it is experimentation. John Gregory, general manager of the Chumash Casino in Santa Ynez, Calif., suggested using focus groups and surveys to elicit customer feedback.
Some gamblers still prefer low-denomination slots and classic table games.
Don't be afraid to take chances out there. That's how Las Vegas was built. Jester Entertainment specializes in manufacturing electronic video lottery terminals with networking capabilities. The tribes are just the start. I plan on putting the game on the Internet soon.