1. Delta has multiple throughout JFk including a D1 lounge for which I don’t see a huge difference. The actual best is at A8 T4.
2. Amex Centurion has one between B and A concourses. It is small and ver crowded.
3. The newest in this region is Sapphire which is better and has made to order food.
4. In the international terminal there is an Air France that opens late.
5. Turkish Air has good food but not as good as Air France but it has longer hours.