I planted a 'Three Sisters' garden this year for the crops it would bring and the way the 3 plants work together- this is just a ground crop (squash, melon, etc.) a corn crop, and a vining bean crop. Th corn acts as the stakes for the beans, and the squashes keep the feet of the beans and corn shaded. Very nice, just plant the corn a couple of weeks before the beans.
My girls ate the leaves of the squash, cantaloupe and watermelon, but I got fruit, anyway. What really resulted was the beans ended up 8+ feet tall with less density at the base and it became a chicken spa! The girls loved hiding in the big, shady pockets and dirt bathing. It was the best accident ever, as it also gave them a great place to hide from the hawks that discovered a potential chicken-dinner-waiting-to-happen.
I'm going to give them a real run next summer- they just free-range around our 40 x 300 backyard. I'm going to plant purple, green and white beans all over the perimeter of it. It's just gorgeous, plus the girls don't really like the beans! Also, I didn't really have to water, even though we get HOT and DRY.
Best of luck!