As I wrote last week, they exist to provide clarity and put people at ease. Nothing renders an event irrelevant faster than a dinosaur dress code.
Granted there are some stark staring mad ones. Establishments that favour a man in an eggy tie over an impeccably stylish one, or whose first reaction on seeing a chic woman in a sleeveless dress is to pass her a pashmina from a grubby selection in a box in reception, are asking to become laughing stocks.
Racegoing glamour: from left, Lisa Taa, the Princess of Wales, Francesca Cumani, Susan Bender Whitfield, and Charlotte HawkinsThen there are the feverish bride-and-groomzilla dress codes.
One guest wrote to The Telegraph fashion team to share the Pantone chart she’d been sent by a bride who wished to ensure the wedding photos would all be tastefully in the cream zone.
Read more on telegraph.co.uk