A complimentary crash course in Viennese waltz will take place for those who would like to learn or brush up their skills before the ball. The event will commence at 8 p.m. and includes live performances from a string quartet of Eastman School musicians, a local Rochester dance troupe, and the Argentinian tango club. A contest will also take place for the best dressed dancer, and the winner will be rewarded with a free lesson series from the Ballroom Dancing Club.