Ah, but without an intermission, would we have such great Act I closing numbers such as 'Mame', 'Before the Parade Passes By', and 'Everything's Coming Up Roses'?
I saw the original production of ACL in 1976 and the scene where Paul tells Zach about his past always felt like an intermission to me. I always got the feeling I was eavesdropping on a private conversation and, when the other actors returned to the stage, it was time for the show to continue.
'Our whole family shouts. It comes from us livin' so close to the railroad tracks'