N Street and Half Street, SE
Thanks to Pepe for sending.
MLB issued a release in January:
“The Washington Nationals announced today a multi-year, exclusive partnership with BetMGM, a leading sports betting and digital gaming company. Key details of the partnership include the opening of a BetMGM Sportsbook connected to Nationals Park and the launch of a mobile app within the permitted area around the Park, as well as fan-focused campaigns and co-branding opportunities.
The BetMGM Sportsbook will provide a luxury viewing and sports betting experience that complements the existing experience at the MGM National Harbor Dugout Club, an eight-seat premier luxury sports box located on the field adjacent to the team dugout. The newly created Sportsbook will be located in the space currently serving as Center Field Social, across Center Field Plaza from the Nationals Team Store. It will not be accessible by fans while they are in attendance at a Nationals game, but fans will be able to place bets via BetMGM’s mobile app.”