I know someone who worked at Chilis and he said non-church groups were the worst.
He talked about a group of young men who had a nice con going for them. They would pay for their tickets with a 100 dollar bill, and then after getting their change they would find the manager and say they got shorted a $20. The customer is always right, and you know the store isn't eating that $20.
Therefore, all non church people are bad.