Images show the 23-year-old singer being forcibly removed by his wrists, with his fists clenched, by a member of the nightclub security team.
A source told The Sun: ‘A nearby table complained to staff and claimed Jay had stolen drinks and caused a fight between punters so security attempted to remove Jay from the VIP area.
He pushed back to try to get them off him, so the security thwacked him. Jay was knocked to the floor and then dragged from the venue.’
The 23-year-old had been supporting his band mate Tom Parker at a personal appearance at The Villa nightclub in Epping, Essex.
Tom had reportedly been given a table as part of the appearance deal, and it was his girlfriend Kelsey Hardwick’s birthday so there was a group of friends out to celebrate.
The row allegedly kicked off at 1.30am on Sunday morning, and ended with Tom putting booze-filled Jay in a cab home.
The Villa nightclub spoke about the incident, explaining: ‘We cannot tolerate this behaviour from anyone, celebrity or not.’
Neither Jay nor Tom have tweeted about the incident, with troubled McGuiness instead posting a video of the evening on his Instagram account.