Restriction: Be bold. Go to a store that you frequently shop at or a restaurant where you frequently eat and ask what they’ll let you make there.
Restriction: Get some chalk and work on the sidewalk near your home.
I took the bold part and decided to ignore the rest, although this is kind of related to sidewalks. And this took more than one day, because I had to track down a friend to help actually implement this. (Plus then I can deny all knowledge.)
M took over the workspace and supplied these photos: