There’s a private bar in London whose members are nearly all war correspondents. He must be referring to the Frontline Club (frontlineclub.com). They're just u

There’s a private bar in London whose members are nearly all war correspondents. He must be referring to the Frontline Club (frontlineclub.com). They're just up the road from Paddington. While the bar is private, they host ticketed events that are open to the public.