In the US, 20-24C is a pretty typical AC setting, with commercial buildings usually closer to the cool end. I don't put on a jacket (other than for fashion) until 15C or so. For me, 26C would negatively impact my productivity.
In my experience for reasons unknown to me men run hotter than women leading to endless battles at the thermostat
Yeah, that's definitely true in my family at least. Radiating space heaters are one good solution to this problem since they allow you to warm up without requiring all the air in the room be heated up too.