I'm having a birthday dinner party in a weeks and i am having serious problems with a seating plan! help?

Is this party supposed to be fun for everyone? Or is it a military operation? Skip the plan, let everyone sit where they choose. It�s only 15 people, not 150. Nobody will be too far away from you. And people won�t stay frozen to their chairs for the whole evening - they will move around talking to everybody. Have a nice party and don�t worry too much.