Quakers
Quaker worship services are called "meetings for worship".  They start with everybody sitting quietly, trying to listen to God. Sometimes, Quakers will feel that God wants them to say something. When that happens, the person stands up and tells everyone. Then, they all sit quietly again. At some meetings, many people will speak. At other meetings, nobody speaks. Quakers feel that a meeting for worship helps them to understand what God wants. Usually, worship lasts about an hour.