Personally, I think they sometimes forget to turn on the hot water heater. Since I always run a tub, I've never actually stepped into a cold shower.
When it happens, I tell the attendant, she disappear for a couple of minutes, and the hot water starts flowing shortly after that.
BTW, it wasn't clear from your post, but did you tell the lounge staff about the cold water or did you just send CX a letter afterwards?
[This message has been edited by Plato90s (edited 11-01-2002).]