Ok, so have to post this one....my ATF FKK....it's a little of the beaten path in regards to major airport/business locations...but I think that's what makes it so much better....50 EUR to enter and 50 EUR per session...never, never had a bad experience.  NIce open seating area with a bar (non-alcholic drinks, save champagne/sekt)....video/kino room on the side.  Also, several types of saunas, tanning bed, and a small outdoor area.  Three stall shower for the guys and a massage table....it's not the largest FKK I've been to, but that's the beauty....the experiences have been very good....no rush.  Slow nights have 7-10 girls....wknds I've seen upwards of 15-20 girls....small FKK though....never rushed and very friendly....

http://www.fkk-neunkirchen.de/files/38/fkkneunkirchenindex.html