The Casino is the definitive late-night spot in Ketchum. Hemingway and Hunter S. Thompson used to hang out here, and it’s been a favorite with locals who want to drink a Hamm's beer with a chunk of lime on top, also known as the Casino’s signature drink, “the Hammtini,” since it opened in 1939. Well cocktails are only $5 and poured strong by the rotating handful of bartenders everyone knows by name. If you’re celebrating a birthday, prepare to be handed a Smirnoff Ice, which you will then have to chug on one knee while everyone in the bar cheers you on.