Actually, the 11 O' Clock number is, for the most part, a solo.
Ragtime: Back to Before
Big River: Free At Last
Company: Being Alive
In Les Mis' case it would be On My Own, cuz that's about the time the song comes on anyway (just a joke, people)
"Do you know what pledge time is, Andrew"? said the PBS Executive.
"Yes", Lloyd Webber replied. "My 50th birthday special must be one program that gets done a lot."
"No", mused the man from PBS heedlessy. "Not so much. Our Stephen Sondheim Carnegie Hall concert. That's a big one."
Spoons, forks and knives seemed suddenly to suspend their motion in horror, all around the table.