All you need. Nothing you don't.
Jim and Casper Go to Church (Barna Books, 2007) is the book title of the adventures of Jim Henderson and Matt Casper as they traversed America, stopping off at different churches. They hit several well known ones and some unknown ones, too, on their weekend journeys.
Casper, the friendly hired atheist for the project, commented on Moody Radio’s Open Line that he felt his house church experience was the “most authentic.” Much of what else which he experienced was considered to be “contrived.”
Does the church take her cues from atheists? Well, that would depend… As always, dialogue is a good start.