If these "dens" were in Crater they would have been too dangerous to visit at that time. Last Post lost the plot with the arrival of the glamorous American reporter. TBH I was waiting for a bomb or hand grenade at the BP Club, much more realistic, but it never happened.
I remember a grenade being thrown by an Arab waiter during a Steamer Point Officers Mess dining in night. When it landed on the table everyone dived to the floor. The only injury was a WRAF Officer, who was a bit slow and ended up with shrapnel in her derrier
