Does the JFK lounge stay open for a v. delayed flight?

Our flight tonight JFK to LHR is delayed 4 hours from a 9:30 p.m. take off to a 1:30 a.m. (VS10)
Does the lounge stay open later for such flights?
Thanks

I'll answer my own question: Yes they do!
Until they call for boarding they stay open.

Nice for the pax, tho sad for the staff.