Choral Arts supporters, old and new, came out March 1 on an unexpectedly balmy evening to chase away the winter blues at the George Town Club with the music of guitarist Michael Bard and many libations and laughs. In the midst of their legacy season for retiring founder Norman Scribner, the group is preparing to celebrate the maestro with a performance of Brahms Requiem at the Kennedy Center Apr. 22, followed by an after-party at the House of Sweden and a tribute concert and reception on June 13 at the Washington National Cathedral.