Bally's Atlantic City offers more than ,, square feet of gamin area in two casinos (Bally's and The Wild Wild West). In addition to more then 3, slot. Bally's Atlantic City is a hotel and casino on the Boardwalk in Atlantic City, New Jersey that opened in The Marlborough-Blenheim Hotel stood on the site Opening date : December 29. Bally's Atlantic City Hotel and Casino puts you right at the center of the action at the heart of Atlantic City, NJ. Book your stay at Bally's today. Hotel · Restaurants · Things to Do · Casino.