Once again, it’s the time of year when the Broadway community to lends a helping hand to Broadway Cares/Equity Fights AIDS. On March 30, fans bid for the opportunity to be onstage at the Nederlander Theatre as Disaster! star Adam Pascal performed a special post-show tune. It’s been 20 years since Pascal played in Rent at the very same theatre, so it seemed most appropriate that he perform “One Song Glory,” his signature tune from that show.