My only conclusion about structure is that nothing works if you don't have interesting characters and a good story to tell.
Harold RamisA friend of mine is trying to do a documentary where he brings Jewish and Arab comedians to occupied territories in Israel. He wants to do shows as a way of finding some comedic common denominator. When he proposed the idea to one of the officials at the Jenin refuge camp, the guy just stared at him and said, "This is not a joke to us. We don't think that laughing is the answer."
Harold Ramis