I just saw two yesterday on near Hing Loong staircase...not advertised on the website, perhaps those room sharing and part time gal......frens/relatives of the permanent WGs.
If u are lucky, there is a small pub opposite Hing Loong (can;t remember the name), yellowish outlay, sometime the WGs sits there tryin to get customers comin to the pub, most of them are Gwai Lou, from what i have seen last time.