One Sunday morning, playing as a single, I joined up with a husband and wife. After introducing herself, the wife asked me, "Why aren't you in church?" (In response, I told her I was Jewish, which is half-true.) Not the best ice-breaker IMO. I'm an agnostic who sides with atheists. I don't concentrate on personal beliefs; I focus on more practical things, set my own standards, take responsibility for my own successes and failures.