I got invited into the JAL F lounge last month by a GCH I met on my LAN J trip from MAD - FRA, what a serious disappointment, not what I imagined a F lounge to be. Very small and busy and not much food on offer, I much preferred the JAL J lounge which I got quite familiar with in 2014 and used a couple of times last year. The only thing going for the F lounge was the champagne and the company.