Just saw a FB post that Flying Bike Brewing Co-Op has signed a lease. Over 900 owners. They need a few more bucks to get over their goal. Good luck to them. http://www.flyingbike.coop/
Although, there is a bit of a difference. The Packers have shareholders, just like GM or Boeing. In a Coop, you don't really get a return on your investment, except for maybe a discount.
But one still owns a share. One does not own a share of a Co-op. And remember, the NFL itself is a non-profit.