Get a taste of the Hemingway lifestyle at the Missoula International School's 15th Annual Salsa Ball. This year's theme, Casino Havana!, features hors d'oeuvres, a silent auction and music by La Pachanga. Funds made support financial aid and educational programs. Holiday Inn-Downtown. 200 S. Pattee. 6:30 PM. $25. mismt.org.