A patron insists they are fine to drive despite showing clear signs of intoxication. The best response is to:

When an intoxicated patron insists on driving, the best response is to try to arrange alternative transportation — a taxi, rideshare, or sober friend — and to follow the establishment's procedures, which may include notifying law enforcement if the patron attempts to drive and poses a danger. A patron's belief that they are 'fine' is unreliable, since impaired judgment is part of intoxication, and coffee will not make them sober. Taking reasonable steps to prevent impaired driving protects the patron, the public, and the establishment from a potentially tragic and costly outcome.