Mad Men-themed Christmas parties have almost become as hackneyed as being given a jumper from Marks & Spencer or making lame jokes about eating leftover turkey into the new year.
The roll of shame is too long to reveal in full but MCBD and Adam & Eve, among numerous others, will know who we are talking about.
It might have been a bit of a jolly jape to dress up as Don Draper or Joan Holloway two-and-a-half years ago when the series debuted in the UK, but now? So please stop. Just go for "worst Christmas jumper" parties - much funnier.