The Financial Post reports in its Tuesday edition that the restaurant and food service industries are grappling with the inherent tension between the risks and opportunities that cannabis legalization presents. In a Post special, Chad Finkelstein writes that opportunities for restaurants are plentiful, whether it is increased customer traffic, the upside from cannabis-tourism revenue, clever marketing programs or, of course, the upcoming regulation of edibles. However, the single largest concern uniformly expressed across all restaurant businesses is the owner's liability when serving a customer who is under the influence of cannabis. This risk is not new, of course, but cannabis legalization does pose the possibility of more prevalent cannabis consumption. If that patron, impaired by cannabis consumption, were served one or more alcoholic beverages, and subsequently caused property damage, personal injury or even death, could the establishment that served the alcohol be liable? A restaurant or bar owner has a unique duty of care owed to patrons both while they are on, and once they have left, the premises. Some restaurant will become an unfortunate test case of the liabilities arising from cannabis legalization.