On my most recent flight out of JFK, I got to the CL a little after 8 pm. The person at the CL check-in desk said I was welcome to enter but that they were closing down the bar and wouldn't restock food, so he recommended I visit the SC instead. Fortunately the T4 SC is quite nice, but I'd prefer they kept the CL serving until later if they can't extend the hours. Surely late-night flights are common out of a major international hub.