These days players in the US are able to gamble for real money at several sites.
By the beginning of 20th century, gambling was pretty much outlawed throughout the USA, thus helping the development of mafia and organized crime. However, relevant laws getting increasingly restrictive has caused such activities to move underground. New Orleans was the first to claim the title of nation’s gambling capital, only to be overtaken by San Francisco during the California Gold Rush. In 18th and 19th century, British colonies were known to use lotteries for raising funds for university and schools. It starts off with Native Americans wagering on games of skill and chance, practice which was later adopted by the European settlers during the 1600s. American gambling history is just as varied. State-run lotteries are more or less run everywhere, with Hawaii and Utah being the only two US states which have completely outlawed all forms of gambling.
While the federal law considers gambling legal, there are plenty of restrictions attached and each state free to allow or prohibit the practice on its own territory. The ambiguous laws make the question of gambling legality in the US not-so-easy to answer. Live Casino Gambling in The United States