I always felt a little bit insulted that they thought Burger King, Dairy Queen, and Pizza Hut would boost my morale. They take some of the cheapest, mass produced junk that passes for American Culture, and then set it forward as a reminder of the American Way of Life that we're all there fighting for.
But that was just my personal take on it. I hear some people actually want to eat that junk. To each their own I guess.