lounge club lets the main holder bring 2 guests in... or if its a closed ink card then its virtually unlimited.. Good luck getting a favor in FRA.
Also, I would not recommend you go to the lounge outside of security.. dont remember the name offhand. its an unnecessary PITA to come back in.
so I have the one time United passes. Currently in jfk and Lufthansa said that they will not allow a united one time pass. I called Lufthansa prior to my flight and they said that I can use a United pass. I have a stopover in Germany. How can I get them to accept my United one time pass at the lounge in Germany?