This hole in the wall is the very popular ‘Jannal Kadai’ (window shop) in Mylapore. It is only a few yards from the main gopuram entrance of Sree Kapaleesrarar temple. (Ponnambala Vadhyar Street). It has no name board and simply goes by the name of jannal kadai. People wait for the shop (window of opportunity?) to open and grab the tasty snacks. The shop has been of recent origin and not as old as some of the other Mylapore eateries.
I am sure Bill Gates had no role in promoting this venture, nor would mind using the Tamil equivalent of his brand name.