Where can you make a street painting?

In the US, street paintings are relegated to public festivals or private events. Unfortunately the US typically does not promote or allow ‘in situ’ street painting – spontaneously created on any city street or public space. Many cities will fine you for working on their streets since they often refer to it as graffiti! (My problem with this is that while graffiti can be destructive by being permanent, street paintings are temporary and are easily washed away.) It would be great if major cities in the US created a program like the ones used in Europe, which designates a few square meters on a public pedestrian street for permitted street painters to make amazing drawings. I’d love to see that become a part of American culture!