Their bosses booked the team into the Motel Mo.om in the Italian city of Milan but had confused it with the nearby Mo.om Hotel.
At least 12 staff were made to stay in the seedy hub, which boasts a vagina-shaped spa bath.
"Getting proper rest is essential to maintaining the safety of aircraft and passengers.
“It was a comical mistake by the hotel booking team, but had serious implications. Some of the team who stayed in the sex dungeon didn’t get any sleep, so they couldn’t operate on BA services the following day. They were kept awake by thrillseekers moaning and groaning all day and night.
“Staff reported constant noise, and witnessed ‘drug deals and prostitution’, as well as a ‘24-hour orgy.
“There were adult workers outside propositing staff. Crew even reported suspicious fluids in their rooms which made their skin crawl.”
Despite the mix-up, there were no reported delays to BA flights.
The airline said: “A small number of crew were moved to unapproved hotel rooms due to availability issues with our usual provider, without our knowledge. We are urgently investigating to prevent a repeat.”
Stephen Moyes