Greenwood Racing Inc.Parx Casino and Racing (formerly Philadelphia Park Racetrack and Casino) is a Thoroughbred horse racing venue and the largest casino gaming complex in Pennsylvania.Parx is located in Bensalem Township in Bucks County, northeast of the city of Philadelphia.Owned and operated by Greenwood Gaming and Entertainment, Inc., …Parx Online Casino and Sportsbook In-Play Betting. In 2019, Parx Casino® launched sports betting with a $10 million world-class sportsbook and online sports betting.