We've been regularly above 90F/32C all month where I'm at, and have already hit 100F/38C a few times, yet I still have to wear long sleeves to work because they run the AC so hard. And we're a casual dress office, too, so nobody wears suits or anything like that. I actually see coworkers sitting at their desks with lap blankets over their legs or around their shoulders.
I wouldn't mind the low temps, if they were natural. But,
A) we're wasting energy to break your heart, and
B) the temp difference between indoors and outdoors only makes the high outdoor temps harder to cope with.
Shouldn't there be a happy medium? Keep it cooler than outside, sure. 100F can be dangerous. But we don't need to crank it down to 65F/18C, really we don't.