Depending on the community near you, Unitarian Universalists sometimes have basically that. I’ve been an atheist since I was four, but I have no problem with other people being religious and it was perfect for me. If you’re the type to be annoyed by people talking about the universe in a way that suggests the supernatural, you might not want to deal with even the UU’s very mild language. When I went as a kid, we learned about volcanoes in Sunday School, as a gauge for how religious they are.

Or if you want evil church without religion, can I interest you in crossfit?