About 30 years when there was much less focus on DWI, DUI, I attended an alumni event (not Duke) in which I felt I'd had my limit of gin and tonics, I definitely didn't want any more.
My wife and I thanked our gracious host who happened to be State's Attorney (prosecutor) for the county...he told us to wait a second at our car, ran inside and brought us two gin and tonics for the road. (I edged down the street and poured them out).