The time of the Great American Party is approaching. By that I mean the Super Bowl, when American homes are filled with cheese dip, loose meat sandwiches, pizza and any other food that can be quickly transferred from hand to mouth. It is, by any measure, a national holiday. And the perfect time to hone the Irish Exit. If you are unfamiliar with the term, an Irish Exit is a departure from a party without a customary goodbye to all concerned.