One tip for the saunas is; never pick a girl who doesn't show any interest in you in the lounge, no matter how hot she looks.
It might seem obvious, but it's difficult not to pick a girl you really fancy, with long legs and a short skirt, stocking tops on show...etc.... but if she's not interested you'll have a crap punt.
Better to pick the 2nd hottest girl with the big smile.