The Knickerbocker Chamber Orchestra recently presented a stylish selection of waltzes, foxtrots and ballads at a free outdoor concert at the World Financial Center. Audience members kicked up their heels and danced to Johann Strauss, Irving Berlin and other great song and dance masters. The Music Performance Trust Fund, which helps fund concerts that are free and open to the public, was one of the co-sponsors of the concert, along with Arts Brookfield. For more information, see www.knickerbocker-orchestra.org. Photos by Walter Karling.