It's possible that Sondheim has said that somewhere so you could have seen it, wrq. He's definitely talked about the whole show taking place in Robert's head.
Here's the quote from Prince (from his book,
Contradictions), which mentions Furth but not Sondheim. I should have checked it first:
"Since Robert never arrives for the final celebration, there was some question whether they represented one birthday or a succession of them. I am certain they were one. I wouldn't be surprised if George Furth believes there were four. It doesn't matter."
This is kind of odd (apart from Prince counting it as four parties, I guess counting the one at the end of Act One as separate from the one at the start of Act Two) because Prince is so concerned about all the creators being on the same page and discussing everything in detail to be sure that they are.
Updated On: 1/8/07 at 07:07 PM