Jiu Ba Gai is a bar street behind the Mong Kok Police Headquarters in Hong Kong, where bars serve draft beer and Guinness. Some bars pour cold Guinness, and the street is a place to enjoy happy hour. It is a relatively relaxed place where talking only requires raising your voice a little, and it suits group gatherings. The street is not crowded as it was on weekends in the past, and the whole street is quiet.