At least for Protestant Christian churches, there can be ambiguity about the purpose / audience of a church meeting. Some meetings are intended as outreach to

At least for Protestant Christian churches, there can be ambiguity about the purpose / audience of a church meeting. Some meetings are intended as outreach to non-Christians. E.g., to present reasons for being Christian, or to let outsiders see what a typical worship service is actually like. Some meetings (or parts of meetings) only make sense for actual Christians: singing worship songs, testifying what they believe God is doing in the world, or taking communion. I think a lot of awkward discomfort stems from lack of clarity on these points, and confusion about which attendees are professing Christians.