Another factor is that it's so expensive to be a member of some religious organizations. I was raised Jewish in an interfaith family and then drifted from the religion for a while before wanting re-explore it. Showed up at High Holy Day services at my old synagogue and was told tickets were $500. For two holidays.A few years later, I looked into several synagogues in my area and was not surprised to see how completely out of reach membership costs were. Oh, and there was no one my age at the services I went to. (So much for Grandma's desperate hope that I'd meet the man of my dreams there!) Mostly seniors and families, and everything felt very unwelcoming and exclusive.