The ESPN Zone is awesome for watching football, but I agree that camping out for that long can get old....and expensive.
Last year my wedding anniversary fell on Superbowl Sunday while we were in WDW. We had planned for a nice dinner and Illuminations boat cruise and didn't want to cancel it, so figured we'd miss the game. After dinner at the Yachtsman Steak House at the Yacht Club we had about an hour before our boat cruise. There's a nice bar right off the main lobby that had lots of seating, free snacks (nothing elaborate, but free stuff is rare at WDW!) and all kinds of beer/drink specials. I'd assume most WDW resorts have stuff like this going on, so if you're staying onsite, or even if you aren't check with the hotels to see what their bars/lounges have going on.
Have fun!!