What a cute and clever idea! Clear around the planting area, for productive growth of the beans. Greate hideaway for kids in the yard, leave the grass in the center.c- I might do this even if i hate beans!
Morning glory porch screen -- You can't eat morning glories but you can use this idea to grow green bean plants that run, such as pole beans or half runners. It will make it easier to pick them plus provide some shade and privacy on your porch.