A few couples at last May's session, who said they weren't religious, expressed some resentment at having to be there.
What, they just thought the Catholic Church would be a good backdrop for their wedding pictures?
Yep. Seems about right. My wife and I do marriage-prep sessions with couples from our parish. Last year, our priest agreed to a request from a couple who planned to marry in a Catholic parish in another state but wanted to do their marriage-prep sessions here. The couple were already shacking up and kept postponing the dates for getting together to discuss marriage plans. Finally, the woman called me and said, "Well, we decided we'd just forget about the church part and get somebody to marry us down on the beach. We don't need any preparation for that." I told her she was probably right on that point.