Sunday nights seam to be the night most guys go. The tree's & bushes have been cut back so less cover & pickpockets & muggings regular even during daylight. PCSO's (community & some police on horseback/push bikes have been known to patrol mostly daytimes. Some murders also over the years. Not seen any ghosts so far. Small area in the shape of a Triangle. Honestly.
It's walking distance of Clapham Junction Rail and Clapham Common/south underground stations.
Clapham Common is a gay cruising area. NW corner between A3 Clapham Common North Side & A205 The Avenue (U-Clapham South, Rail-Clapham Junction) AYOR