My son always had his friends over here for every game of every sport. They loved little hot dogs - I used crescent dough and cut it into smaller triangles than the ones that are already 'perforated", slicing each triangle into 3 more, then wrapping the mini franks in those and baking according to the dough instructions.
They also loved mini meatballs - easy to make in a sauce of half chili sauce, half currant jelly, and serve with toothpicks.
I make a fruit kebab piece with a half watermelon (regular or seedless) - wash the green surface, scoop out the flesh, the shell upside down or put on a paper towel. Cut some small holes in it with a metal skewer or sharp knife. Make skewers of different colored fruit - I like the plastic picks that have little arrowheads on the end because the fruit stays on better than the plain toothpicks. I use whatever fruit is in season or on sale: peeled and cubed kiwi, cubed honeydew and cantaloupe, watermelon, seedless grapes, pineapple, blueberries or strawberries (halved or quartered), etc. Don't use apple or banana - they get brown. Put 3-4 pieces of any fruit on a pick, mixing up colors. Stick the picks in the pre-cut holes so it looks like a porcupine or hedgehog. It's a nice centerpiece and it offers a healthy alternative, and it doesn't need to be heated or kept on ice for the duration of the game.
Rachael Ray did a whole week's worth of Super Bowl recipes on TV this week, including meatballs shaped like little footballs so you might check out her website.
Artichoke dip - 1 cup good mayo (the cheap or low cal stuff is usually too oily), 1 cup real (grated or shredded) Parmesan cheese, 1 can artichokes (regular, not marinated). Drain and squeeze the liquid out of the artichokes, then put all the ingredients in a food processor and pulse. Otherwise, you can finely chop the artichokes with a chef's knife and mix in the rest of the ingredients. Add seasoned pepper to taste or just regular pepper, but if you use seasoned, it looks nice to put a little extra on the top. Put it all in a crock, and bake at 350 for about 30 minutes until brown and bubbly. I do mine in the toaster oven if I don't have other things in the regular oven. It can go right on a wooden cheese board or a trivet - serve with "substantial" crackers or little party rye or pumpernickel breads (you can usually find those near the deli counter or cheese section if not in the bread aisle).
Easy cheese puffs: Buy a pack of English muffins, split and toast lightly so they are firm but not burned on the edges. Meanwhile, mix together cheddar cheese (shredded) or Monterey Jack with good mayo. You can do 2 batches, one with an orange cheese like cheddar and another with a white cheese like mozzarella. You can do one that's spicy like Mexican or taco cheese. You want a paste so the cheese shreds hold together but not so mayonnaise-y that it's runny. Spread the cheese mix on the muffin halves, going pretty close to the edges. Take a sharp knife and cut each muffin half into quarters. Put them on a baking sheet with about 1/2 inch space in between. At this point, it can be refrigerated for a few hours or overnight - I cover with foil or plastic wrap, sticking a few toothpicks in some of the pieces to keep the covering off the cheese. Bring to room temp, then put in a hot oven (375 or 400, whatever you need for other things) or under a broiler (but watch them!) until brown and bubbly. Some of the cheese will run off the cut edges but it's fine. Remove with a spatula and serve - people think you really fussed!!