According to MN lore, not only will it feed 5 people, but you'll be able to make another meal out of it and boil the bones for stick (which apparently counts as a whole 3rd meal even though all the chicken contributed was stock).
Yes... a 'serving' of meat only needs to be about 4oz - 6oz. Two poeple have a leg each and the rest share the breast and wings. If you've got bacon sausages etc and plenty of veg to go at, no-one will go hungry. BTW... even if they eat every scrap of accessible meat, you can still roast up the bones with some veg and make a very tasty stock for another day.