Even as more states move to get a piece of the action, US casinos have run into a string of bad luck as the recession and other factors cut into gambling revenues.
Gaming revenues in the 12 US states authorizing casinos fell 5.7 percent in 2009 to 30.7 billion dollars, according to a preliminary estimate by the American Gaming Association, a trade group.
This followed a 4.6 percent drop in 2008 gross gaming receipts, the figures showed.
Gaming industry analysts say the recession has hit gambling along with all other consumer and leisure activities.
But some say other factors are hurting casinos, including new entertainment offerings such as Internet gambling, which is illegal in the United States but according to some surveys is still widely practiced.
A study by market research firm Mintel showed that 30 percent of adults visited a casino in the past year, down from 35 percent in 2001 -- a 14 percent decline.
"This shift has been gradual, which suggests that this is not a result of the recession," said Billy Hulkower, a Mintel senior analyst.
Hulkower said the trend suggests little or no growth in casino attendance over the past decade, a period that included two recessions and an economic upturn. This means economics is not the only factor, he said.
"Casinos may be losing audience to the increasingly compelling entertainment offerings in the home; such as HDTV (high definition TV), high-end video game systems and the Internet, including Internet gambling," he said.