The computer room was kindof okay
Some twenty racks, with assorted servers, disk shelves, tape drives and comms stuff, all reasonably orderly. Not at the 'neat' level, but I've seen worse.
The problem was with the aircon. One of the two units had a leak, and they had already used up their quotum of CFC-based coolant so it was out of action, with the other running flat out. It had to: the room was in a 'temporary' wooden single storey building, knocked up in the 1950's or maybe early 1960's (this was 2003, so ...) with a low, tarpaper-covered roof. Temps in the adjoining offices could easily reach 35C on a moderately sunny day. To increase aircon performance they had installed a pair of garden sprinklers underneath the heat exchanger, which fortunately happened to be mostly in the shadow for a large part of the day. Around 10 o'clock someone would have to open the tap, and the last person to leave had to turn it off again. On warmer days this required staying overtime, occasionally until 20:00. Even hotter days required the back door to be opened and half a dozen floor-standing fans adding a feeble breeze to the existing airflow.
My suggestion to visit the nearest hardware store and drop a couple of buckets of white paint on the relevant section of roof, or, even better, deploy a few rolls of reflective bubblewrap foil, was dismissed with "this is a temporary building". Which was a) actually the root cause of the problem, and b) had been its status for the past four decades.
Yes, this was a (semi-) government department