Here, in NZ, because it's midsummer, many industries close from 24th Dec to 5th Jan, and sometimes much longer - to mid , late January as schools don't start their year until early Feb. It is the start of the annual holiday season.
Work events are muted this year - no fun celebrating when many people just down the road are being made redundant. Typically, a work celebration would involve an outdoor barbeque with sports ( cricket, football ) that starts about midday and lasts several hours. Staff are encouraged to bring young children, and suppliers and customers are often invited.
These events are seen as informal, friendly form of "thank you", rather than opportunities to guzzle and whine. Most people here drive to work, so alcohol consumption for many is moderate - younger, single people may decamp to a pub - if still around in the evening.
The site I'm on has ( correctly ) asked for none of the outdoor activities be obvious to passers by, as a large biscuit factory on one side is permanently closing, and 25 people have lost jobs from a manufacturing facility on the other side.
Christmas here is also a time of reflection about the past year and impending year, and thinking about those whose circumstances are not so favourable is an important part of the spirit of Christmas.
Please keep having fun,
Bruce Hamilton