This analysis case explores second-hand smoke and its impact on the decision to institute a smoking ban in the outdoor seating area of a popular coffee bar.  In working through the case, students discuss the medical, ethical, legal, and societal issues of smoking in public areas.  in addition, they devise experimental schemes for collecting data to determine how profitability is affected by a smoking ban. The case could be used in many science courses, including introductory biology and chemistry, in addition to liberal arts courses that deal with public policy, such as political science or civics.  It could also be used in a course in public health or adapted to a business/management class.