A bar bet is a bet made between two patrons at a bar. Bar bets can range from wagers about little-known trivia, such as obscure historical facts, to feats of skill and strength. Some bar bets are intended to trick the other party into losing. Famous bar bets The annual Midnight Sun baseball game played in Fairbanks, Alaska (the only game to be contested after midnight without the use of artificial lighting) was established in 1906 as the result of a bar bet. Two of Tony Hawks' books, Round Ireland With A Fridge () and Playing The Moldovans At Tennis (), were written describing Hawks' attempts to win two bar bets. The film To Have and Have Not is supposedly the result of bar bet between Ernest Hemingway and Howard Hawks, with Hemingway betting Hawks that Hawks couldn't make a good film from Hemingway's worst novel. A common rumor claims that the creation of Scientology was the result of a bar bet between L. Ron Hubbard and Robert A. Heinlein. Richard Leiby, a reporter for The Washington Post covering the group, never found any evidence to substantiate it. A class of Feynman Diagram became known as a Penguin diagram due to a bar bet between physicists John Ellis and Melissa Franklin. Enforceability Under contract law, bar bets may or may not be legally binding, and the winning party may have difficulty having a court enforce the bet. A written contract, drawn up soberly the next day and signed by both parties, can avoid doubt. For example, if one or both parties are intoxicated when the bet is made, they may be found to lack capacity to agree to a contract, and the contract thus found void or voidable. However, the fact that the agreement is oral but not written does not undermine it: oral contracts are valid, though certain contracts must be written, under the statute of frauds, such as for the transfer of land. Trick bets In the UK in particular, bar bets are tricks which the "mark" cannot win. They usually depend upon a condition set in the bet that the mark doesn't notice. Some famous examples: The mark is told that a coin of a particular denomination has been made so it cannot be laid on its edge. The trickster offers him a sum of money for any the mark can lay on edge. When the mark