This would be mine: Find or create a very groovy hippie commune, full of nudists and vegans, the real hard core hippie lifestyle. Tons of pot and tie dye and granola munching in every direction. Make it like Survivor and throw a dozen or so average folks - or what would be funnier, a bunch of very conservative suits, and see how long they survive in that environment.
haha or something else to eat besides granola....perhaps mars bars with chunks of raw steak on top? hehe
I know I've mentioned it before, but throw a bunch of angry people with pointy sticks into a pit with a limited food supply.