We have many and yet none.
90% of the extended family gather at the largest house that is centrally located (was my house when I was a kid (then we moved to a town house), Aunt's house (then she moved so she is no longer in the middle), cousin's house the last few years)
We do Buffet style. All the food is set up in one room (usually the dining room) and we use one long table in the largest room in the house (usually the den)
We watch the parade, or at least the end to see Santa
We play board games as a huge unit till all hours