Public spaces are all around us. We encounter them every day as we go about our routine activities. We use public roads and sidewalks to get to work and school. On the way, we stop by a coffee shop to caffeinate ourselves and say hi to the other regulars. At mid-day, we sit in outdoor plazas and mall food courts to enjoy our lunch. On the way home, we might meet friends at a local bar for a drink and to talk politics. And on the weekends, we go to the mall to shop; to the park to relax; to the museum or theatre for fun. We depend on public spaces just to get through our daily lives.