I thought I would start a thread about Partytreffs -- the other major type of sexual recreation business in Germany.  I've been to both FKKs and Partytreffs.  As I'm sure as many others would attest, both places have their pros and cons.  Here are my partytreff pros and cons:

Pro's:
1. One admission price, usually about EUR 100, for either a several-hour block or time or for an entire day/night.
2. Unlimited sex, although some places limit you to once per girl.
3. I've found them to be more of a party atmosphere and less of a business atmosphere.
4. More mature women (i.e.: older) who generally seem to enjoy lots of sex.
5. Some have regularly-scheduled gangbang or group sessions.  It can be a lot of fun if you're into that.
6. Once you've paid your admission fee, you don't have to worry about running out of money.

Con's:
1. Women are older and mostly in the 5-8 range in terms of looks and body.  If you're into the supermodels or the stunning Eastern European 20-somethings, partytreffs are not for you.
2. Very few are near Frankfurt, so you have to drive to Koln or the Dusseldorf area (in my experience).
3. The sex sessions generally aren't very long -- just enough to get you, and sometimes her, off.  Perhaps this is because there is no per-session fee.
4. The sex is either semi-public or very public.  If you're interested in behind-closed-doors intimacy, the raw sex atmosphere of partytreffs probably won't be to your liking.

I've been to both types of places and I'm really torn concerning which type I prefer.  I guess it has more to do with the overall club itself.  I will say that the atmosphere at the partytreffs I've attended are more relaxed.

Perhaps we can start a listing of places people have attended?

I've been to PT 188 near Frankfurt.  It's definitely not the best PT in Germany, but, it's close to Frankfurt.  I've also been to PT Mettmann near the town of the same name.  Older women -- matronly, in fact -- but, sex could, and did, break out at any time without warning.