It depends on whether you plan to serve the chicken in pieces or pulled. Each chicken has 8 pieces - 2 legs, 2 wings, 2 thighs and 2 breasts. If you serve the grilled chicken in pieces, plan on giving each person 2 pieces, which equals 4 servings. If you pull the meat from the bones, you can plan on 1 cup of shredded meat per person. Each raw pound of chicken equals about 1 cup of cooked chicken, so a 4-pound bird will serve 4 people and a 7-pound whole chicken will serve 7 people.