Now here’s betting on futures. Prairie Meadows has chosen William Hill to work as the casino’s official sports book operator — should Iowa lawmakers vote to allow sports betting. Legislators have discussed the idea, and the casino industry has lobbied to make betting on various sports events legal. It is unclear if the legislation will be passed this session. William Hill would operate a more than 8,600-square-foot sports book on the casino’s Level 4, near the property’s racing center. The area would feature a new bar and video wall.