Kathryn Klibanoff and her husband, Jeremy Pierotti, hosted a musical seder they called “Passover on Broadway” to mark the holiday Monday night. Guests sang “Tonight” from “West Side Story,” changing the lyrics to relate to the Passover feast. Among the guests, from left, were Ralph Campbell III, his wife, Katy Koch Campbell, their son Jack Campbell, Simone Pierotti, 9, and Theresa LaFavor. The plate in the center of the table held the traditional seder foods of lamb, karpas and charoset.