Many moons back in my old company, we were downroute in Innsbruck, 7pm pickup it was- 7pm came and went, bus was here, crew all here, capt still missing. After an hour, Ops phoned, told us he'd been stopped in the lobby and blew 0.08
Turns out he'd used mouthwash, and was tested as he stepped out the elevator.
He was invited for tea and biscuits and now works in Sainsbury.