I caught the third preview. The set didn't work for the second scene and they stopped the play and Patti, Christopher Fitzgerald and (forgive me, I don't remember the third person) came out and entertained us in front of the curtain. One of the gentlemen quipped, "Patti usually doesn't come out till the second act!" The show resumed, and in Act 2 when she said "I'd like to propose a toast" the crowd went wild because HER BIG NUMBER WAS HERE! And my god did she deliver. I will go back, whenever that may be.