I went to Wendy's for lunch today and when I unwrapped my sandwich I noticed the inside of the wrapper was a hexmap. The hexes were too small for standard minis, but I could totally see a bunch of gamers stroll into a Wendys, order a couple chicken sandwiches or burgers for game night, and walk out with not only food but a handful of free game resources to boot.
So my question is this: have you found any hidden troves of gaming resources out in the 'real world'? Has anyone ever used their tile floor as a grid-map, or used a board game as a territory map? What mundane objects have you turned into gaming aids?