bex77

I can think of a lot of weird options, but seriously, I'd go with barbeque. There's really nothing else like it, it's extremely American (god, I missed it while I was in Europe) and there are decent options for getting it brought to your office. (Blue Ribbon does cater...)

Other random thoughts:

Buffalo Wings
Tacos (Make your own, yum!)
Spam (very big in Hawaii!)
Chili (Texas and/or Cinncinati-style)
Cornbread
Boiled peanuts
Stuff with tomatoes or corn.