Sorry, I know that was a serious request, and I do enquire of trusted individuals for utterly unavoidable functions I really can't duck, such as certain weddings, work outings and the like.
Once I've got beyond not actually giving real offence, or firm (but often unwritten) conventions at work etc. I really can't bring myself to care much.
After that, I refer to Terry Pratchett in Lords and Ladies:
"The Monks of Cool, whose tiny and exclusive monastery is hidden in a really cool and laid-back valley in the lower Ramtops, have a passing-out test for a novice. He is taken into a room full of all types of clothing and asked: Yo, my son, which of these is the most stylish thing to wear? And the correct answer is: Hey, whatever I select."
Also with a nod to Lord Vetinari, who: "dresses entirely in black clothing - not the flashy black of a villain trying to impress but the drab black of a man who doesn't want to spend time deciding what to wear in the morning." That is spot on!
If I site is offered, I will be interested to view it, but probably be horrified.