If they’re bigger folks or starving and someone doesn’t want bone-in chicken, I could see it. 3 large 4 piece combos is $55.50 in Miami, and I think there are other things in that range (eg a 5 pc tender meal if someone hates bone-in chicken so they can’t get a family meal).
The family meals are substantially cheaper than individual meals, if you can get everyone to agree on bone-in chicken and the same 2 sides.
A 20% tip would push that up to something like $66.
Why would you tip at Popeye's? It's fast food.