Ah ha! Is that how the showers work!!

On my recent trip to France on BA in first I was hanging around the first class lounge in Terminal 4 when I decided to take a shower before my return flight to Chicago. I took the rather long walk down to the very crowded Terraces lounge and found the shower area telling them I had come down from the First lounge, just as a matter of fact, not knowing it would get me anywhere. The fellow asked me to sign in and although it appeared that I was signing below lots of un-crossed-out names, they immediately led me to a shower room. Dumb luck I thought. Now I know better.