My attire:
"Casual" = jeans + collared polo/short sleeve/long sleeve with casual design
"Work" = "Casual", except shirt has to look somewhat formal-ish; perhaps substitute jeans for trousers
"Business" = trousers + long sleeve business cut shirt; tie optional
"Formal" ~= "Business"; anything more formal (e.g. tuxedo) and - what the....what are you doing flying in that??!! ("Just Married" and "Just Stumbled Out Of A Formal Event" situations excepted)
Frankly, if the lounge dragon wants to make a statement about what I'm wearing, I'd be very surprised. I don't care whether it's 32 degrees Celcius or 32 degrees Fahrenheit outside, or whether I'm at 30 degrees south or north of the Equator. I think I dress fairly well for travel - some people would probably say overdressed. Then again, I'd listen to
how the lounge manager says their statement: they may be joking/making banter, in which case an equally comical repartee will be exchanged.
On the other hand, you can tell which ones are trying to be more pretentious...more "What on earth do you think
you are doing here?" In which case if I do not see fit to control myself a less pleasant repartee will be imparted
. Fortunately, the latter situation has not occurred yet.