Atlantic City's Borgata Casino (owned by MGM) has a sportsbook in place and is ready to
once the green light is given. There are already talks of a new $7 million sportsbook eventually being built as well. An issue that has popped up however is that MGM owns the WNBA's Las Vegas Aces which to outsiders looks like a conflict of interest. It's one of many instances in which a casino/sportsbook has financial ties to a professional sports team.
“As soon as regulatory approvals are in place, we will begin taking sports wagers,” Borgata President Marcus Glover said to the Associated Press. “Borgata is uniquely prepared to begin operations as the only Atlantic City casino with an existing racebook.”