our old house has no heat upstairs, which is where my sewing room is, so sometimes leggings & sweats in the winter...but dh put up some track lighting on the collar ties for me & they generate a good amount of heat.. plus the iron, so after an hour or so, it warms up some & i take the sweats off...usually dd is up there with me going "jeez ma!"
in the summer, it is ungodly hot, so i have this nasty old beach coverup i wear a lot & dh put in a 52" ceiling fan...
i arranged the room so my sewing table is right under the fan , dd & ddil get whatever breeze they get...seems fair, neither of them have hot flashes! lol