Everyone processes things differently. For seniors, this is their last chance to have fun and blow off steam before entering the “real world”. But seriously, the University can’t require that students be gone from their dorms with less then 24 hours notice – that would be cruel to those that will already struggle to find housing and/or transportation. Some students don’t have to worry about these things and suddenly find themselves with plenty of free time and the need to blow off some steam. Thus, partying.