You might have some trouble finding a bookstore willing to let you do the Ellison Stunt (but then again, considering where you live, maybe you won't). I know I wouldn't do that, because I need to edit constantly, and the possibility of going through writers' block with people watching me makes me sick to my stomach.

But it does sound like more fun. If a bookstore won't sponsor you, maybe a privately-owned coffeeshop would.