Yeah, DD was born at the beginning of August and the maternity ward of our hospital was HOT. They have those big plastic doors at the entry to the ward so that the nice warm air stays in while the rest of the hospital is freeezing.
I laboured in a Bonds singlet, no socks, nothing else (but for a maternity bra) and was constantly demanding ice water (my mouth was really dry from the gas too, but I was SWEATING) - meanwhile DH was wearing a hoodie and the midwives all had their thick stockings on!!
By the way my singlet still gets worn all the time, all the muck washed out as soon as I got it home so don't worry too much about ruining anything.

After the labour, it was back into trackie pants and a thick jumper (which is hilarious because we don't experience temps lower than 18C even in the dead of winter here, people think we're weird because we go out clubbing in the middle of July in miniskirts and singlet tops!) for my 'walks' outdoors, but inside it was quite toasty.

HTH!!