I stand often. There is usually at least once performance in each show that I'd consider to be outstanding. If not, I might stand for the material or the overall emotion I felt during the show.
And I do admit that sometimes I stand when I really wouldn't because other people do.
Honestly, I generally think standing ovations are a pain, but if it is a great performance or show then it is worth the work.
So, that was the Drowsy Chaperone. Oh, I love it so much. I know it's not a perfect show...but it does what a musical is supposed to do. It takes you to another world, and it gives you a little tune to carry with you in your head for when you're feeling blue. Ya know?