Pokernight, you list Mary Louise Wilson in Gypsy. Are you thinking of her as Tessie Tura (she was the best Tessie Tura I've ever seen) or as Rose? As far as I know, she only went on once as Rose. I believe that's what she said in an interview a few years ago. I seem to think that it was at an added performance during the Los Angeles run of the long pre-Broadway tour. In any case, I'm pretty sure that she knew in advance that she would be going on.
I would love to have seen her as Rose. If you are citing her performance as Rose, I'm wondering if you knew when you bought your ticket that you would be seeing her.