Three visibly intoxicated men order beer, and their designated driver orders a soft drink. What action must the server take?

In many jurisdictions, it is illegal to serve alcohol to individuals who are visibly intoxicated. In this scenario, since the three men are visibly intoxicated, it is the responsibility of the server to refuse them any more alcohol. The designated driver ordering a soft drink is irrelevant to the situation of the visibly intoxicated individuals, and the server should not serve them any more beer. This is done to promote responsible alcohol service and prevent potential harm or dangerous situations that may arise from overconsumption of alcohol.