New expansion plans will ensure that Foxwoods keeps that claim to fame. Mashantucket, CT 06338 Phone: (860) 312-3000 Employment Website Description: Foxwoods is the largest resort casino in the world. The casinos are open 24 hours and the gambling age is 18 for Bingo and 21 for casino games. In 1994 the state also granted the Mohegan tribe permission to build a casino on their reservation. The tribe ended up building Foxwoods which is the largest casino in the world. They brought their case all the way to the U.S.