Finding the ZRH LX F Lounge - like Finding Nemo
I could use the line "you'll have a whale of a time!" but I won't.
Having been there twice this summer, I can agree that it [and the Arrival Lounge] are not well marked. Neither are as nice as the LH FRA lounges. That being said, it is a quiet place to await the next journey. The food offerings, although limited, are "tasty" and do change with breakfast, lunch and dinner. Sure beats waiting in the UA Club in DEN.
Did you try the unusual ice cream servings from the freezer conveniently hidden in another part of the lounge?