Jealous mum of three Holly Gilbert bottled a woman who her ex boyfriend had added as a friend on Facebook, a court heard.
In Gloucester's H20 club Holly Gilbert hit Amy Morse on the forehead with a bottle and then threw it - hitting barmaid Rochienne O'Shea on the forehead and knocking her unconscious.
Gilbert, 29, of Hawthorne Avenue, Gloucester, who works as a carer in a head injuries unit, pleaded guilty to two offences of assault causing actual bodily harm on November 24 last year.
She was sentenced to eight months imprisonment suspended for two years and placed under supervision for two years.
Judge Jamie Tabor QC also ordered her to attend eight sessions of a women offenders group and told her she must pay each of her two victims £150 compensation.
"You have injured two people in a nasty manner," said the judge. "Nothing in your history suggests you are a naturally violent person - quite the reverse. You are spoken of highly by persons you work with.
"You do a valuable job looking after people with brain injuries.
"On this occasion you were out for the first time in a long time and you saw somebody whom I suspect you were jealous of.
"As a result an utterly innocent barmaid gets knocked out and a young woman who didn't want any trouble with you gets assaulted. That is utterly disgraceful."
Prosecutor Julian Kesner had told the court "She was unhappy that her ex boyfriend had added Amy Morse as a friend on Facebook. She had spoken to Miss Morse on the phone about this and it was not a friendly call. Miss Morse said she was aggressive."
On November 24, the two women were by co-incidence in H20 when at 1am Miss Morse noticed Gilbert staring at her, Mr Kesner said.
"She approached the defendant to try to sort it out. She wanted to tell the defendant she was not interested in her old boyfriend.
"There was pushing and shoving and other girls got involved. The defendant then struck Miss Morse with a bottle, cutting her above the eye.
"She then threw that bottle, or a glass, and it struck the barmaid Miss O'Shea on the forehead with considerable force."
He said Miss O'Shea was unconscious for 18 minutes.
Amy Morse suffered a 2-3cm cut on her eyebrow and a one centimetre cut on the bottom of her eyelid. She also had a bruise under eye and her nose felt sore and swollen. At A&E the cuts were glued but no stitches were needed.
Miss O'Shea, however, had an egg sized swelling on her forehead and a cut requiring three stitches.
Fraser Stewart, for Gilbert, who had no previous convictions, said it had been her first night out since before the birth of her youngest child, now four, who suffers from cerebral palsy. Her other two children are six and 11 and she is a single mum, he said.
He said that she works in a brain injury unit and is all too well aware of how serious injuries can be caused by just the sort of offences she committed.
"She is mortified by what she has done and is incredibly upset," he said. "She has never sought to shirk her responsibility for these offences.
"She had been out to release the built up pressure of her life at that time and she just lashed out. She just wishes she could turn back time.
"Her employers are keen to help and support her but there are going to be disciplinary proceedings flowing from this case. She stands to lose an awful lot."