On busy weekend nights the landlord in a skanky pub I used to like back in the 90s used to half fill pint glasses from the drip tray and keep them hidden under the bar. When a drunken group came in, which was all of them, he'd pick up the half-filled glasses, top them off from the pump and serve them up to the punters. Waste not want not eh?Ron Pattinson talks about that. I couldn't believe it - literally bottom of the barrel beer in returned casks put back into whatever was brewing.