The Seward Cafe in Minneapolis has running successfully as a "cooperatively owned, collectively operated restaurant and community-oriented venue" for 49 years. https://www.sewardcafe.com
I always enjoy these kinds of articles - "Could this radical new way of doing things ever succeed?" where the "radical new way" has a history going back to before the Reagan revolution. We're a really kind of unimaginative people when it comes to talking about how one arranges things in society.