In Emmanuelle Mattana’s Trophy Boys, four debaters huddle in an empty schoolroom (nifty scenic design by Matt Saunders), strategizing for the final match of an interscholastic tournament. They’re seniors at Imperium, an elite boys’ prep school; the imminent debate is against a team from a similarly tony girls’ school. This is the swan song of the boys’ high-school extracurricular lives. They’re undefeated and, being fiercely ambitious, terrified of losing this last debate, especially to a female team.