Years ago in San Francisco I stumbled on a combination Starbucks / bank. It impressed me, and other combinations came to mind: a golf course / cemetery, a school / prison, etc.
These little fast food "food courts" have always struck me as the epitome of modern packaged cuisine, like those "assortment" boxes of school lunch potato chips.
I assume a big tanker truck pulls up in the middle of the night and fills an underground tank with the 5 basic ingredients that go into all this cuisine (sugar, fat, salt, filler and flavor packets), and the manager starts up the "food extruder" around 6 AM, which pumps out the donuts, slurpees, buffalo wings, burgers, pizza, fries, salad bar croutons, ranch dressing, lowfat soy foam mochachinos, etc.
The next obvious step in this evolution is to put a fast food franchise INSIDE another fast food franchise -- then put IT inside a bank inside a laundromat inside a grocery store inside a hotel on top of a football stadium.
Then put THAT in the hole in the center of the Pentagon in D.C. -- it's a shame to see space go to waste...