I don't care about football. Football isn't my sport - hockey is. But, Superbowl Sunday is just an excuse to go over to a family member's house, eat food, drink, and just have a good time together.
I went over to my aunt and uncle's house (it's been a tradition to go over to their house, but I hadn't been in years because of college). My grandparents, cousins and cousin-in-law, parents, and cousin's pet celebrated Superbowl Sunday together.
We drank wine and beer, ate copious amount of appetizer-type foods, laughed, and I along with the others in the kitchen probably watched about two minutes of the game.
(Also - Josh, the cousin-in-law, his birthday is celebrated each year on Superbowl Sunday!)