Germany FKK's
I've been to "The Palace" a couple of times. Very easy to get to by subway -- about a 2 minute walk from the station.
It's a very weird, but quite wonderful environment. You walk in and pay the cover (around 75 euro), and they give you a locker key. You shower and put on a towel and slippers and enter the club. The first thing you encounter is the buffet -- which is a bit of a shocker at first. I mean, roast beef, big long sausages -- eating in public while basically naked is odd.
Most of the club floor is laid out with couches, and the women are lounging around nude waiting for you to join them. There is also a bar area (no alcohol), a pool and a bunch of private rooms. When you see a girl to your liking, you go over and chat. After a few minutes she'll invite you to a private room.
Once there, don't expect GFE, though YMMV. It's one SOG and safety-first. I don't remember whether it was 75 or 100 Euro each time. You're not going to get a super-intimate experience here -- but that's not what it's about. It's variety and number of times in a night -- all in a fun atmosphere and reasonable prices. I've not experienced much hard-sell there.
The attractiveness of the women in my experience is excellent. They are almost exclusively EE -- mostly Romania, Bulgaria, Ukraine, Russia -- pretty hot. The sheer numbers, dozens of women on shift, is wonderful and bizzare. I can't really describe it, but it's just weird to be in a lounge with all these naked women and just walk over and pick.
In any case, have a blast!