Quick question. I am on the red eye next week from LAX to JFK, arriving 5:05. I am flying Business Class and am BA GGL (so One World Emerald). I have to go straight to a family meeting. Can I use the Flagship Lounge in JFK to take a shower and refresh? Answer may be obvious, as AA webpage is not easy to navigate. Apologies for clogging up AA forum, but I am a very infrequent US domestic flyer.