Besides the regular deli meats, crackers and cheese, fruit plate and veggie plate your options can be plentiful!
I know Subway has great party sandwiches you can order that are about 6 feet long.
Bean Salad
Taco Salad
Cold Pasta Dishes
Potato Salad
Egg Salad
Chicken Salad
Tuna
Chips and dips such as:
Bean Dip, Guacamole, Salsa, veggie dip
Dessert ideas:
jello, Cream Cheese fruit dip, Cheesecake, Carmel apples, Make your own sundae corner, fruit pies, cakes, mud pie, Banana Cream pie etc....