The lower Mississippi River valley became a hotbed of gambling activity with New Orleans emerging as the nation's leading gambling center. When New Hampshire authorized a state lottery init represented a major shift in social policy. These include everything from bingo games in church basements, to multimillion-dollar poker tournaments. For information on over online gaming sites including online casinos, online poker rooms and online bingo halls click here to visit Casino Casin Online Gambling Directory. Archived from the original on May 14,From Nevada to Iowa, the top ten states for casino gambling in the The state first legalized casinos in , with the first one opening its. In many states, current laws don't authorize live gambling. Which states without casinos are we talking about? Have a closer look here. Discover all you need to know about online casino gambling in the USA in 1. How old do you have to be to gamble? Minimum Legal Gambling Age by State.