The TWA Flight Center opened at JFK in 1962, and became a designated New York City landmark in 1994. People probably didn’t start skating it until some time later. It was designed by Eero Saarinen, who, diminutively speaking, also unintentionally designed two other New York skate spots: The CBS building, and the old version of Lincoln Center (the eighteen-stair hubba Heath Kirchart 5050ed in Sight Unseen, and a lot of marble benches that were probably destroyed during the renovation.)
We like to make a note of non-sensical inclines / skate spots in fancy buildings. Hopefully, there are many more to come.