Don’t roll your eyes. It doesn’t have to be corny. No need for tacky Christmas sweaters or ’80s dance parties, but every party has a purpose. It could be a housewarming or a holiday. It could just be that your creepy roommate is out of town. But if you do want to get epic with your party theme, there are endless possibilities: Rubik’s Cube, Seven Deadly Sins, the always-classic-but-never-classy Toga Party. It’s not necessary to have a quirky theme, but people have more fun at theme parties. It’s science.