He asked a junior female colleague: "Who the f**k are you? What do you even do here?" and told another, "I thought you were a little b**** but you know you're OK and I like you."
Mr Keenan informed a female colleague he wanted her number but was afraid he would get rejected, and told a male colleague who tried to join them, "I'm talking to her now, f*** off."
Later, he unexpectedly kissed one colleague, inappropriately touched another on the chin and told a third: "My mission tonight is to find out what colour knickers you have on."
These are just some of the Australians who have paid the price for seriously overindulging in the seasonal spirit. We're all ready to let loose and celebrate at this time of year, and for some it's too easy to cross the line.
"It's unfortunately the case that when freeflowing alcohol is involved at Christmas parties, it can often result in people doing things they regret," Slater and Gordon lawyer Aron Neilson told news.com.au. "You wake up with the hangover that doesn't go away, and you can lose your job.
"We see constant examples of things employees post on social media getting circulated. People insulting the boss, saying they're not a good manager or what they'd like to do to them. If it's not OK to post at 11.30am, it's not OK to post at 11.30pm."
Sally Carter was on the other side of the fence. As the only female staff member at her Sydney construction equipment rental company, she was excluded from the work Christmas function so her colleagues could invite a topless waitress. She successfully sued for sexual discrimination.
Along with aggression, inappropriate sexual behaviour can be a major issue when people overindulge at Christmas celebrations. "Touching people inappropriately on the dancefloor is a classic example," said Mr Neilson. "Whenever there are festivities, people lose their inhibitions. Just exercise common sense."
In a landmark case, Wolmar v TraveLodge in 1975, a housemaid at an ACT branch of the hotel twisted her ankle, fell over and broke her leg at the Christmas party. The judge ruled she was entitled to compensation because the average office worker would regard attendance at the annual party as part of the job.
So remember, no matter how much fun you're having, you're still officially at work.
"Gripes and grievances at the manager, people let it all out.