I'm generally in stretchpants, sports bra, wife-beater or t-shirt with the sleeves cut off. After I break a heavy sweat, I'll take off the t-shirt. I've got to be able to move around easily and not get hot!
Hair is usually in a ponytail or ball cap.
Make up is usually gone by the time I get there.
BTW, I'd like to vent about the women who come in with the full make up and hair down & styled.....Ladies give it a rest! You look ridiculous!!! Your working Out, not working It!!