Members of - most likely - the Netherlands Tennis Club in Hong Kong, however on different location (I think) than the other pictures with the same subject I posted. My grandfather Pieter Marks (1893-1981) is the man in dark suit sitting on the ground in front (more or less in the middle)
Comments
I don't see anyone dressed
I don't see anyone dressed for tennis so I guess this may just be a photo of a group of friends, that happened to be taken on a tennis court because it is an open area.