I did this one year for a Christmas Open House in PA. Bread Bowls!
I made Richard's Chili, New England Clam Chowder, and Carrot Curry Soup (also excellent cold) for the vegetarians. I ordered small round loaves of bread that I hollowed out and used a torch to toast the inside. I also had coffee mugs for those who didn't want bread.
I could make all these ahead of time and since it was 20 degrees outside, they sat, well sealed, on shelves in the garage overnight.
Like Michael, the buffet table was loaded with appetizers and a salad bar. I served the soup from the kitchen since everybody seems to end up there anyway. For once I didn't mind because all the surfaces were not cluttered with food to be cooked at the last minute, sauté pans, or bubbling pots.