When I was growing up, my brother, dad, and I would play MarioKart 64, Diddy Kong Racing, and the dreaded MarioParty together.
Now that we're all much older, on the holidays the entire clan will gather at my grandparents house and play wii together. Last year we played a lot of the minigames on wiifit and this past Christmas we played DJ hero and this Cabela's hunting game. The best part about it was that half of us would be sitting around the corner eating dinner when we would hear the roar of a bear and "shoot him! SHOOT HIM!!!!"
Gotta love being home for the holidays.