in Cairo in 1942 looks like he's ready to prepare his clientele for the weekend. I think the caricature is Churchill. Possibly a British officers' bar. Shepheards? (burned 1952). Bar Cecil? (Survived into the 70s, when they made it into a bank.) It doesn't look like the Barrel Bar at the Windsor Hotel, a British survival that still survives I believe. Or one of the Clubs? Anyone who knows post a comment.
I don't think it was a Muslim Brotherhood hangout, but you never know.