Since a couple of people have mentioned venues rather than food...
My chapter had a tradition of going to IHOP after pref. There used to be an IHOP in Kenmore Square in Boston. Once we'd turned in our bid lists, we'd walk across the river (this is funnnnn in heels
) and head over to IHOP for a late night carb fest. It was rather amusing watching all the heads turn as a group of women wearing black dresses, heels, and pearl jewelry, with beautifully done hair and makeup, walked into IHOP, took over a couple of tables, and proceeded to scarf down chocolate chip pancakes, blueberry pancakes, waffles, etc.