There's a specific moment that happens in a mixed-loyalty household. The groceries are half unpacked, one of you has already spread a Seahawks table cover across the dining table, and the other walks in holding a Broncos one. Both were bought on purpose. Neither person is folding.
A split table actually looks better than a matched one. It just needs a plan instead of a standoff.
Pick a seam and commit to it
The cleanest version is a hard split down the long axis of the table. Plastic table covers run 54 inches by 102 inches, which is longer than most dining tables and wider than half of one. Fold each cover lengthwise, lay one over each half, and let the fold sit down the center. The doubled plastic hides the overhang, the crease reads as a deliberate line, and you've used two covers on one table without either team getting buried.
Round table? Skip the split. Put one team's cover down as the base and ring the outside with the other team's plates. The center belongs to the food, not to either fan base.
Napkins carry more of the load than plates do
Team napkins come 16 to a package, 2-ply tissue, quarter-folded to 6.5 inches square. That fold matters here. Sixteen of them stack into a tight block of pure team color, and from six feet away a stack of napkins reads louder than a plate does, because a plate spends most of the party covered in food.
Put one stack at each end of the food table. People sort themselves without being told, and nobody has to make a joke about it.
Some color pairs fight and some don't
Worth checking before you buy. Two teams that share a dominant color turn into mud on one table. Lions blue and silver next to Colts blue and white is a good example of a pairing that just looks like one slightly confused team. Jets green beside Seahawks navy and green has the same problem from across the room.
High-contrast rivalries are the fun ones. Raiders black and silver against Dolphins aqua and orange separates instantly. Same with Patriots navy and red against Rams blue and gold.
If your two teams overlap, don't try to blend them. Put physical distance between the stacks and let a neutral zone sit in between.
Keep the center of the table out of it
Serving bowls, the chip platter, the thing the wings come out on. None of that should carry a logo. Solid black, white, or a neutral tone in the middle gives your eye a place to rest, and it means the food looks like food instead of like a third team crashing the party. A few pieces of solid color tableware handle that better than anything printed.
One thing not to buy
Skip the full duplicate set. Two complete sets of everything for a house of six means 16 dinner plates, 16 cups, and 32 napkins for a group that will use maybe half of it. Buy one team's plates and cups, buy both teams' napkins, and let the napkins do the dividing. Plates get stacked and grabbed at random anyway. Napkins get held all afternoon.
The other thing to skip is a generic house divided banner. It says the joke out loud, and the table already said it better.
Team packages sit in NFL party supplies, and if one of your two teams isn't stocked in a given season, generic football party supplies will cover that side without picking a fight. New customers get 10% off with code PARTY10.