A Sweet 16 is one of those parties that only happens once, and everybody feels it: the birthday girl or guy wants it to look and sound amazing, and the parents want it to run smoothly without a hundred loose ends. Whether you're celebrating in Center City, out on the Main Line in Bala Cynwyd, or over the bridge in Cherry Hill, the same few decisions make the biggest difference. Here's how we'd plan it if it were our own family's party. Start with the guest list and the room B
