Carrie Porter attacked her victim as he was leaving the The Pocket Sports Bar, on Doncaster Road, Langold, at 11.15pm on September 12 last year.
Prosecutor Marie Stace described how the 50-year-old occupational therapist slapped the man twice in the face and punched him twice in the stomach as he was leaving with his dog.
Porter was grabbed and moved away, while another man continued the assault – leaving the victim with an injured jaw.
In a statement, the man, who is a former member of the Armed Services, said the whole incident made him fearful and worried about leaving the house.
Porter told police she had been with friends since 3pm that day as part of a hen night outing, said Ms Stace. She claimed the man made unwanted sexual comments and personal remarks which made her lose her temper.
She admitted to being drunk, but added: "I can't remember assaulting anyone. I don't know why I would do that - I have got too much to lose."
When she was shown CCTV footage of the fracas during a second police interview, Porter said nothing.
James Buckley, mitigating, said the man's injuries were not attributable to her and it was important to note there had been two separate assaults.
After she hit him, her victim told police that he ‘didn't feel any immediate pain or discomfort’, he said.
"She was in drink," Mr Buckley added. "It was one of the first times she had been out after the lockdown.
"She found being held in a cell overnight very distressing. This won’t happen again.”
He said Porter, who helps people to live independently and has no previous convictions, ‘may well lose her job as a result of this matter’.
Porter, of Conway Drive, Carlton-in-Lindrick, pleaded guilty to assault by beating when she appeared at Nottingham Magistrates Court, on Wednesday.
Magistrates fined her £166 and ordered her to pay £85 costs, a £34 victim surcharge and £300 compensation to the man.