Co-ops are Co-operatives, where people pool together their resources to provide for a need.
There are lots of types of co-op and they are normally not-for-profits that just want to bring a service or goods to people, or bring people together.
I've done a search of Utah Co-ops to see what's available around here. I've only tried a few:
1. www.BountifulBaskets.org (available in cities all over parts of the West, check the location: AZ, ID, UT, WY, etc.)
Various assorted semi-local Produce Baskets you order the week before(and a few other food items, including organic option) and then pick up at a designated location.
2. www.utahcoop.org (4892 S. Commerce Dr (300 W) and only open Th, F, Sat for limited hours)
Discounted food/essentials store- They get good deals from grocers for cheaper food and they don't re-sell for a high profit like most grocers. Their cheese is normally only $1-3! Which is awesome. and they have various options depending on the week. But, it is hit and miss, so don't go expecting amazing things all the time.(It's like shopping at the thrift store D.I., sometimes you find hidden treasures, but it's not always the same stuff). They do sell bulk diapers for cheap, if you're doing disposables.
This is an educational-type of co-op. You can sign up for free newsletters which connect you with helpful info on educational classes they offer on gardening, food storage, finances, etc. They generally do a class here and there about 4 times a month at one or two downtown SLC locations. But their website has some helpful info right on it. I found a pdf document of an S.O.S.(Sauce or Soup) recipe and a list of meals you can use this with (it's a pre-prepared flavoring packet you create)--great for food storage I think..I haven't tried it yet. (http://extension.usu.edu/files/publications/publication/FNP_101.pdf)
Feel free too try them and post comments on what you've tried.
Here's a list of others I haven't tried:
The Community Food Co-op of Utah: Crossroads Urban CenterA self-sustaining food purchasing network along the Wasatch Front that brings people together for food, savings, and community.
Goal is to provide the best quality locally-grown and supported food for the best price (generally 30-50% grocery price. You order a basket of food for about $20 and then pick it up at a designated location. They have meat baskets and such too. The only other requirement is that you do 2 hours of service a month (for anyone, anywhere, but for the co-op if at all possible). They aren't fully organic.