Troy Blackford smashed a slot machine while he was gambling at Prairie Meadows Casino. He was banned from the premises. Despite the ban, he later gambled at the casino and won $9,387. When he tried to collect his winnings, the casino refused to pay. He filed a suit for breach of contract, arguing that he and the casino had a contract because he had accepted its offer to gamble. Is there a contract between the casino and Blackford? Discuss. [Blackford v. Prairie Meadows Racetrack and Casino, 778 N.W.2d 184 (Iowa 2010)]