Sing and Swing with our Headline Performers and Special Guests! Provincetown CabaretFest’s Variety Show Extravaganza celebrating the American Songbook of the 30’s and 40’s is a not to be missed festival highlight, Sing and Swing features more than a dozen performers, hosted by the one and only Warren Schein with Music Director Tom LaMark. Come boogie-woogie with the best!