Casino operator Caesars Entertainment Corp. (CEC) officially joined its rivals in the sports betting market derby, right on the heels of one Atlantic City casino that has started taking sports bets this week.

Bally’s Wild Wild West have started accepting sports bets on Monday morning, while its sister casino Harrah’s Resort will open its doors to punters on Wednesday, according to CEC. This makes the twin gambling facilities the third and fourth casinos to offer sports betting in Atlantic City.

Bally’s temporary sportsbook operation inside Wild Wild West reportedly has 30 leather chairs placed right in front of three large television screens and five smaller screens. Bally’s has converted its shuttered cashier windows to sports wagering windows. Harrah’s sports wagering space looks quite similar to Bally’s, although Harrah’s only has 28 leather chairs, six high-top tables and five screens for viewing.

CEC also plans to bring sports betting in Mississippi by mid-August through its casino properties, Horseshoe Tunica and Harrah’s Gulf Coast resorts.