Religious institutions are one of the few places in modern society that have open door policies, and they require little or no paperwork for people to attend their worship services. They believe it is important to foster a sense of community, and many religions hold tightly to the belief that spreading their message is one of the more important aspects of their faith. They will go out of their way to make newcomers feel welcome at a worship service, and they often have committees to help new members navigate the services they offer the community.
While these types of policies can be found in nearly every church, those who are not members of a particular religion will find that converting to their chosen religion does have rules. Long established churches such as Roman Catholics have firmly established rules for becoming a member of their faith, but many smaller churches with no affiliation simply welcome anyone to join them for a service or the rest of their lives.