I'm sure I've used this anecdote elsewhere on this 'ere forum.
Back in the 90s, I was a contractor at a Well Known Bank in That London. We were a key beta site for Windows NT, and we rated a visit from a L33t squad from Microsoft to help us with some issues.
They turned up, during a typical London heatwave of 30c highs, really smart in short-sleeve shirts, loose ties, and smart shorts (complete with crease). They thought it HILARIOUS that we were duty bound to our heavy wool suits, sweating it out in inadequately air-con'd server rooms.