I never got to see it, though I have read the Samuel French script and have a copy of the recording, which I got from someone who knew Tia Riebling's mother. (The story I heard was that it was the recording made was a souvenir for the cast members.)
Something of interest is an album of Carolyn Leigh songs called "Witchcraft" recorded by Sara Zahn. She sings a few of the songs written for the version of "Smile" that she and Marvin were working on before her death.
When Howard Ashman joined the project, they threw out all of that material except for the music to the title song.
"A coherent existance after so many years of muddle" - Desiree' Armfelt, A Little Night Music
"Life keeps happening everyday, Say Yes" - 70, Girls, 70
"Life is what you do while you're waiting to die" - Zorba