If you're a sports fan, you have your team allegiances.  You root for your favorite team as much as you root against their arch rivals.  A Chicago White Sox fan and a Chicago Cubs supporter take their rivalry to a new level in this video from FunnyorDie.com.  Actors Nick Offerman and Craig Robinson are seen in a bar arguing with each other about their teams.  It should hit home for baseball fans, and you may want to take a few notes for the next time you're playing your arch rivals.