Loved the I DO, I DO story, DR ChasSmith!  I also have one from 1967:  Mom took me for my first visit to NYC and we saw CABARET.  We waited at the stage door afterwards and it was right next to the I DO, I DO stage door.  We saw Robert Preston and Mary Martin come out and get into a limo together.  When I close my eyes, I can still see them waving out the back window of the car.