The Study Circles Resource Center guide for "Building Strong Neighborhoods" and the larger Neighborhood Kit has a plan for organizing whole cities and well as the dialogue guide.
SCRC offers study circle programs that have been used around the country to address racism, education, youth problems, etc. (Bill Bradley is an advisor). The SCRC guide is available for $5.00 plus $2.00 shipping. See www.studycircles.org or call them at 860-928-2616 or email Francine Nichols at email@example.com for more details.