Using JFK clubhouse whilst in transit

Hi
I am flying upper class LHR to JFK then connecting onto a Delta first class domestic flight. I have a 4 hour layover. I know I can’t access the delta lounges flying domestically but will I be able to access the virgin clubhouse on arrival?

Yes - you can access the JFK Clubhouse, or the Delta One lounge.. or both if you have time

Use the delta one lounge for sure.