Ncl sky spa/thermal question...

[Denman]

Hi! I understand that the NCL Sky does not have a thermal suite and therefore does not charge for the steam/sauna areas. But, are they coed or do the men and women have separate sauna/steam rooms? How large is this area compared to the Jewel class thermal suite areas? I was on the Jewel a few years back and it was the most wonderful thermal area I'd even seen. Which of the NCL ships have paid thermal areas? I think the fee areas are nice since they keep down the number of people using it.