I would cook at any business, in any parking lot, I often park next to those little verges in large shopping centres or malls with a tree or on the edges of parking lots, usually the farthest away where there is a bit of dirt, so I can dispense of any extra water. I cook when it is time to eat, when I am hungry, there is no shame nor is there a need to hide, cooking and eating are normal for most people. I often stop and have a hot drink, anywhere, side of the road, busy downtown Main Street of the city, at a truck stop before going to bed, waiting for a ferry, most of the time no one even knows I am doing it. I often talk to strangers while preparing a cup of tea or a dish with the door wide open. Am I missing something here?