Playwright Jeremy O. Harris has a rule that he doesn’t cry in public. He broke that rule the night Rihanna attended his Broadway debut. Harris uses the singer’s 2017 hit single “Work” throughout his searing “Slave Play” and the pop star had promised to stop by one day. When she did, he wept. Recalls Harris: “I was an empty shell for a day.” Harris considers Rihanna “the patron saint” of the play. “Work” was playing in his head as he was coming up with the idea for it. (Oct. 15)