I've never heard of a "pig party" like that -- how terrible for those girls!!
My dad told me that his fraternity used to have a "red-headed formal" every year where the brothers were told that morning to find a girl with red hair to bring to a dance taking place that night.
My dad went to a school that was, at the time, made up almost completely of men so the brothers had to really scramble to find a girl to take to the dance. Of course, the girls didn't know the real reason they were being asked --- although I'm sure it became very obvious the moment they arrived at the party.
This type of party is no longer done by my dad's fraternity at his alma mater, thank goodness! How cruel to let a girl think you're interested in her when she is really just the butt of a joke!
