Looking back over the past few years, Drowsy Chaperone probably is the new musical that goes on the longest before the music starts for the first time. IIRC, recent shows like Spring Awakening, Curtains, Jersey Boys, Mary Poppins, LoveMusik, The Color Purple, and The Woman in White all have music right from the get go, and in Grey Gardens, it starts very quickly.
"What was the name of that cheese that I like?"
"you can't run away forever...but there's nothing wrong with getting a good head start"
"well I hope and I pray, that maybe someday, you'll walk in the room with my heart"