Our company (large company) doesn't do anything - it isn't PC and they might offend someone.
But, my department does a type gift exchange (everyone brings a gift and we play the game where first person gets a gift, second person can either pick another gift or take the first person's gift, etc. Lots of fun!) and we either order pizza or all bring in food. Also, my boss and his wife have a very nice party for our department at their house.