2 questions about Sadie Hawkins dance?

well this one girl in one of my cles asked a guy to Sadie's by getting her teacher's permission and getting a balloon with writing on it telling him to pop it, inside there was a note in it that told him to open the shades on the clroom window, there was a sign covering the window that told him to go out side, once he got out side, he saw her standing out side with a sign that just simply siad Sadie's? on it. I thought it was a pretty cute/creative way to ask him to the dance :] i hope this might help or give you an idea :)