Do rural churches still have potluck suppers?
The context indicates that yes, most smaller rural churches still like to have potluck suppers, while the speaker is unsure whether big city churches continue the practice. Attendees bring whatever food they feel qualified to bring, place it on the table, and everyone eats together.
Les explains that in the early church, before the Lord's Supper, they were having a great big potluck supper, which is what we call it now. He notes that he does not know if the big city churches still do it anymore, but he knows most of the smaller rural churches still like to have their potluck suppers. People just bring in whatever they feel qualified to bring, put it on the table, and everybody eats.