People who attend religious services report being happier than those who do not. Why? Is it because of some transcendental experience, the religious part of the religious service? Or is it the service part, the gathering of like-minded souls, that explains this phenomenon? In other words, could these happy churchgoers receive the same hedonic boost if they belonged to a bowling league or, for that matter, the local chapter of the Ku Klux Klan?
