It depends I guess, remember cold is better for girls (hardens those nipples) than for guys (George Costanza's "shrinkage"). Snuggling under the covers with your lover? Mid 60s, Fucking like bunnies with your client? Warm enough that you feel comfortable completely naked. Just my opinion, I've been wrong before.
I stay over at my folks, and they would burn me up. They like it at 78. I would turn to 73 or 74 at night, because I was sweaty so bad that I got heat rash in my private area.
Well I will chime in.. I guess different times and services cause for different tempts. When you are about to do the wild thang you need it cool and comfortable already going to break a sweat.. WELL I HOPE SO...LOL
My service however it IS VERY VERY WARM when you walk in which makes you want to rip off your clothes very fast and once the warm lotion starts cooling off and evaporating from the pores of your skin the room feels just right. However if you came in and the room felt just right when the lotion started to evoprate you would feel like you were in an ice box and you would start to shiver....
AND YOU CAN NOT RELAX IF YOU ARE SHIVERING...but like I said if I was planning to do a (workout) I would have it cool and just warm up the room with activities...lol