Pinpointing where Durham’s nicotine addicts get their fix. Duke Research blog, Aug. 10, 2017. It’s been five years since Durham expanded its smoking ban beyond bars and restaurants to include public parks, bus stops, even sidewalks. While smoking in the state overall may be down, 19 percent of North Carolinians still light up, particularly the poor and those without a high school or college diploma. Now, new maps show where Durham’s nicotine addicts get their fix.