Formerly known as the MGM Grand in 1973, Bally's is one of the premier hotel-casino-resorts in Las Vegas. A mammoth hotel, six restaurants, nightly entertainment with magicians, crooners, dancers, elaborate costumes. For gamblers, there's a 67,000 square-foot casino, 1,800 electronic slot and video poker machines, including the world's first known $1,000 slot machines.