Arthur Laurents (book), Richard Rodgers (music), and Stephen Sondheim’s (lyrics) Do I Hear a Waltz? gets the Encores! treatment at New York City Center. Melissa Errico, Claybourne Elder, Karen Ziemba, Nancy Opel and operatic tenor Richard Troxell lead the cast. Here, Playbill captured two tunes during rehearsal. Evan Cabnet directs, Rob Berman is music director. Performances are May 11-15.