It's not green men but a grey lady drinkers at this pub should be watching out for, as it is allegedly haunted by a ghostly woman.
But manager Jules Jones says the apparition, which has appeared twice for her and several times to other drinkers, is completely harmless.
"I've been here eight years and she was appearing long before that," said Ms Jones. "She picks her moments but people never say they are frightened by her."
No one knows the background to the pub's supernatural visitor, but she could have arrived at any time over the past four centuries as parts of the building date back to around 1640.
Ms Jones said: "It's a charming building with low beams and lots of nooks and crannies. It was apparently used by highwaymen in the past and there's even a secret hideaway by the chimney where Dick Turpin was alleged to have hidden."
Nowadays The Green Man attracts a more law-abiding crowd, with plenty of friendly regulars and lots of families.
Opening times: Noon-11pm Monday to Saturday, noon-10.30pm on Sundays.
Drinks: Always offer three real ales. At the moment they are Young's Special, Abbots and Directors.
Food: Traditional British dishes and some newer flavours are served noon-9pm every day.
Entertainment: A children's playground in the large beer garden, bar billiards and giant chess.
Kids: Welcome with an adult, until 9pm.
Pets: Guide dogs only inside the pub.
Tel: 020 8890 2681