An art walk is when a bunch of artists, usually from one or more areas, get together on a boardwalk set up by the city to promote the art scene in the town. Anyone can apply as long as they cover the fees. You set up a 10x10' tent, hang or display your work, and hope that it sells. It's a great way to get exposure and see some really good work. There are tons of places that do it, and you might have seen one in your town. Almost everywhere has an art guild of some sort.