What are some good musical theater trios for 2 guys and 1 girl?

"Prima Donna" from "Phantom of the Opera" is a great one! As is any song sung by Christine, Erik, and Raoul, like "Down Once More"--the finale. If you are operatically-challenged, I'd avoid them. You might like "Minstrel Number" from "White Christmas"--very fun, and obscure to the new generation of thespians. I know a few numbers from "Jekyll and Hyde" would work; between either Lucy and two guys at the Red Rat or Emma and Henry and her father or Simon Stride at the engagement party in Act I. Check them out. There is also "Kids Game" from "Blood Brothers"--sung by Mickey, Eddie, and Linda. One of my favorite trios is "Intoxication", sung by Marguerite, Otto, and her lover Armand, from the musical "Marguerite". The show is by the same composers as "Les Miserables". Numerous numbers from "Mamma Mia!" come to mind, "Name of the Game", "Our Last Summer", "Thank You for the Music", and "Take a Chance on Me" in particular. There is "The Riddle" and "Believe" from "Scarlet Pimpernel" as well. What about "The Dance", Back in Town", "Fall of Saigon" or "The Confrontation" from "Miss Saigon"? I hope you find what you are looking for. Best of luck!