Strip Mall Delivery

We've all ordered out for pizza, Chinese, groceries, prescriptions or whatever. Instead of each store providing their own delivery service, why not have a strip mall where each store agrees to support a common delivery service? That way, when you call to have your antibiotics delivered, you can tell them to also bring out two videos, a pizza with mushrooms, a quart of Mocha Almond Fudge ice cream, a pack of cigarettes, a pound of coffee and, oh yeah, a pack of toilet paper. Each store would absorb that percentage of the cost of the delivery that was attributable to their store. The customer's happy, the stores are happy, and the delivery drivers are happy.