As these retail outlets march towards the centenary mark, an attempt to decipher that which makes them click: Gem & Co at NSC Bose Road in George Town has persisted with its belief that fountain pens, even artisanal ones, have a place in this digital age. And Kalathi Shop, operating from a hole in the wall at North Mada Street in Mylapore, is essentially a petty shop that has people beating a path to its door for its rose milk