Back to the original topic of this thread, I got a chance to check out the JFK lounge this morning. The airport was surprisingly busy, I assume due to the dregs of Thanksgiving travel, and there were maybe about 20 people in the lounge in total while I was there.

It's a very nice lounge, in line with the other Centurion lounges, and lots of windows and light which is nice. Breakfast was maybe a bit less exciting than I recall other Centurion lounges having, with 2 hot dishes -- a vegetarian breakfast sandwich and a plate of potatoes, eggs and bacon, but that may just be a COVID-era adjustment. All food and drink was served to you by the staff, and all of the staff were extremely attentive, welcoming and friendly.

That said, imagining summer 2019 afternoon traffic levels at this lounge is enough to give anyone an anxiety attack, even in a non-pandemic world. It felt like there were fewer total seats than in the Sky Club, even though that lounge was already packed, and many of the same passengers would have access (plus more who skip the Sky Club because it doesn't allow their guests in, who would come to the Centurion lounge in 2s and 3s, plus those flying other airlines).

And the layout is much more cramped, with narrow corridors alongside seating to get around, which would be totally congested with people dragging their roller bags around. It does help create some more private spaces than the Sky Club has, but it's just going to be tough. As it is, there wouldn't really have been anywhere to put my roller bag while I ate breakfast near the buffet if not for that every other table is closed off for social distancing.

The lower level will probably be the better option once things start to pick up, as it's somewhat bigger and it's easy to walk right past the stairs and elevator without noticing them. But even still the elevator will probably be very busy with people going back and forth.

I also stopped by the Sky Club to see how it's doing and the food selection was respectable, certainly closer to normal than what Delta is doing on board these days. Everything was packaged but a very wide selection including some healthy-ish options like salads and wraps, and would be easy enough to slip some things in your bag to mitigate the no food onboard most flights these days.

Considering that the lunch/dinner food selection at the JFK T4 Sky Club was actually pretty good pre-COVID, assuming Delta gets back to that level, I would probably skip the Centurion lounge most of the time once travel is back to full speed. But we'll see how things evolve.