I will be visiting Frankfurt in Oct. This may be a stupid question but my girlfriend is into women.   Are couples allowed into FKK's. Anyone ever see a guy and his wife/girlfriend in a club.

Couples are rare, but welcome.  In the Frankfurt area, the girls that would be interested would approach you and her.  In most places, your wife/gf would change and shower in the guys locker room, rather than with the club girls, however.

On the other hand, in FKK Samya, many of the girls shower and change in the same location with the guys, so it would not be so unusual to have your wife/gf change there as well.  And its more of a party atmosphere, but in Samya, you'll have to make eye contact and approach and proposition the girls.

Oh, and she will be treated just like you would be treated.  She'll be charged an entry fee and be given a towel and flip flops.  Some places (including Samya in Cologne) offer robes.  I know that Oase offers robes if you request them at the desk when you enter.  Not sure about Palace or World.

I haven't seen any couples in the dozen-odd FKKs I've been to in Germany over the last few years.  But, I have seen couples in the Partytreff variations.  If you go farther afield from Frankfurt up towards Bonn, Koln, and Dusseldorf, you will find numerous ones.  Partytreffs have a single entry fee -- I know it's really cheap for couples -- and you can have all the sex you can muster.  Some couples come to play with other guys and ladies and some couples come to "show off" and have public sex in front of everyone else.  Everyone is completely laid back, so you could do whatever you wanted.  It really helps to know some German, which I don't.  Some of the customers might be able to handle some English.  So, plan on a language barrier.

Another option are swingers clubs.  These operate just like the ones here in the US, although they can be elegant.  They aren't restricted to hotels or houses where you try to be low-key.  I've gone to a few, mostly when they have gang-bang nights.  Being a couple, you would have a lot more choices.  The openness and attitudes in Germany (and most of Europe) will simply blow your minds.  Your GF won't want to leave.  (FYI, you won't either!)

There are some excellent websites which are all about the sex industry in Germany.  I've found Google Chrome's automatic translation feature to be quite useful.  

I'm a basic member, so, unfortunately, we can't PM each other.  Perhaps my email address will show up in my profile somehow?  I'd be happy to help further offline if we can figure out a way to do it.

It was at Oase where I saw a guy and  his girlfriend/wife together walking around. They did use the same locker room as the rest of us. And I think both wore towels - hers up high. The funny thing was, despite all the working girls running around nude, or nearly nude, I got hung up on wanting to see her nude, and unfortunately, never did. Weird, huh?

I'm from DC,  here in Frankfurt right now.  Let me know if you find a good club

Palace also has robes, World has robes but charges for them, I think its 35 Euros but the robe then belongs to you. They've had black, white and red ones with the World emblem embroidered on the front.

FYI, at Samya the women have the choice to shower upstairs away from the men. Some women are lazy, don't care about showering with the men thus use the basement shower since its not separate. There also the possibility of getting a locker in the woman's locker room which sometimes happens when the place fills up.

Not all clubs allow you to bring a woman with you (couples) so you should ask. The first concern at the clubs is letting the couple know that under no circumstance can the woman go with other men. She is restricted to only being with the man she came in with and the women working. I've seen it on a fairly common basis at Oase. Its not always been allowed.