I drink a few times a month at the Rudder Room in Channel Islands and it's a regular hang out for commercial crews and captains of all types of vessels and jobs. The Captains are always conscious and vocal about tests and are tested frequently. The ones I know will only drink after they get off shift on the last day of the shift and only then. Days off until they return to work they don't drink at all, no vices. Clean, legit test every time. No question IMHO, an eye opener that testing is every day, all the time, any time.