Tang's DW

Some days the jokes write themselves: Boston police locked down the entire city, except for Dunkin' Donuts so that the police could get their doughnuts and coffee. Insert laugh track here.

Also, via Wikipedia citing the Catholic Encyclopedia, Saint Duncan of Doughnut was a real person: Dúnchad mac Cinn Fáelad (also called Dunichad, Duncad, and Donatus)