They are not religious, so they don't go to church. But they are searching for values and rituals with which to raise their children, as well as a community of like-minded people to offer support. Dozens of parents came together on a recent Saturday to participate in a seminar on humanist parenting and to meet others interested in organizing a kind of nonreligious congregation, complete with regular family activities and ceremonies for births and deaths. "It's exciting to know that we could be meeting people who we might perhaps raise children with," said Tony Proctor, 39, who owns a wealth...