"Later that day we received the news from the police that no parent wants to hear."
Mr Hall, of St Peter's Street, Lowestoft, had previously studied to be a doctor, and later a teacher, as well as working as a lab assistant in hospitals in London and teaching English in China.
He also opened a boat building workshop at Ellough Industrial Estate.
Emergency services, including an air ambulance, were called by staff to the pub, where Mr Hall was identified through their test and trace system and CCTV, which showed him walking straight to the toilets upon his arrival.
Senior coroner Nigel Parsley concluded Mr Hall died a drug-related death.