Following on the success of last season's "The Essential Puccini," The Washington Chorus presents "The Essential Rachmaninoff," featuring instrumental and choral music by the Russian master Sergei Rachmaninoff. Selections include his crowning achievement, the monumental Vespers and Symphonic Dances for Two Pianos, featuring Maestro Julian Wachner and Grace Cho, both on pianos. Sunday, Nov. 21, at 5 p.m. Kennedy Center Concert Hall. Tickets are $15 to $65. Call 202-467-4600 or visit kennedy-center.org.