I found myself at a Quaker meeting and became fascinated at how they had no doctrines. "The Light" is a nebulous term that does not require specific beliefs, but could be called 'understandings".
There are now, of course, at least three varieties of Quakers, and one of them even has ministers and actual services, with psalm readings, sermons, and the rest of the trappings of a "real" church. But it's not them I care about. More traditional "unprogrammed" Friends sit in silence in a sort of meditation, speaking only when the Light moves them.
Atheism is quite common in these meetings, but there is still a quite spiritual attitude that's closer to Buddhism than what we know as Christianity. There are strict codes of ethics, but none of that comes directly from God, who does not speak to us. God may or may not be behind it all, but since nobody has heard from she, he, or it in at least 2,000 years, we have developed our system ourselves.
When I moved to an area where the closest Meeting was about 80 miles away, there happened to be a Universalist church two blocks away. There's singing and sermons, and readings from famous UU's, but no Eucharist and no specific doctrines. We have had a few outspoken atheists, but other than them no one has seen fit to mention belief, which is actually a relief. Even the ministers express no beliefs of their own. Their job as ministers is to minister to our own questions and doubts-- not to inflict their beliefs on us. They suggest, but don't preach.
The military chaplain's corps act the same way. Catholic chaplains minister to Jewish soldiers and Rabbis minister to Muslims. (Or at least that's way it's supposed to work.) The point is not the personal belief of the pastor, but the duty to the believer.
= new reply since forum marked as read