I am talking about chicken as main protein in a dish in normal 1 to 2 course eating. Not 8 course meal.
My guess when cooking would be 1/4 chicken per adult so four people.
2 x breast and wing
2 x leg quarters
Person in my family suggests 10 easily:
2 x wings
4 x white
2 x drumsticks
2 x tighs.
AIBU chicken can easily feed 10.
AINBU ten people will be very polite and say nothing but stay hungry. Share among 4.