Who controls the temperature?

I use to work in an office, that was mainly full of women. Some of the women employees were young and some were older. There was a constant battle over the temperature in the office. The younger women would freeze to death, since the older women(going through the change)were having “hot flashes” and kept the thermostat set at 65 degrees. Question: So, how would you determine who has control over the thermostat and how would you handle this situation?