Two Ilkeston men travelled to Nottingham for a night out and ended up fined after fighting with each other.
A taxi driver filmed the incident on his mobile phone and this was played in court as John Feakes and Scott Mattison faced magistrates.
The court heard that the pair were in a relationship which has now ended but they still share a house on Mount Pleasant, Ilkeston.
Presiding JP Kim Geering, who sat with two colleagues, told the pair: "You say you are friends. It didn't appear you were getting on very well at the time.
"This is domestic violence," she told Feakes, 29, and Mattison, 28. They both admitted breach of public order on Fletcher Gate at 5am on December 22.
The magistrate added: "We observed you while CCTV was being played. Both of you were extremely embarrassed by the sequence. You could not bring yourselves to watch the CCTV in court."
Sanjay Jerath, prosecuting, told the court that the film was taken by a taxi driver who was worried about the incident. It shows a passer-by trying without success to part the pair.
He told the court: "Clearly this is city centre violence. We don't want people fighting late at night.
"What they are doing is exchanging punches and kicks. Police quickly arrived and arrested both defendants." Neither man was hurt
Feakes said that the the dispute began over a bank card. When shown CCTV at the police station, he told officers that it 'looked awful'.
In court, Feakes said: "It was really out of character, obviously. It's terrible. It does look awful."
When asked if he had been drinking, he said he had 'maybe too much', telling the court that they arrived in the city at 11pm.
Mattison told the court: "I can't remember what started it all. I can remember us starting arguing."
He was fined £553 and Feakes £415, after their incomes had been taken into account.
They must each find £85 prosecution costs with Feakes ordered to pay £41 tax and Mattison £55.