Dozens of dabbawallas congregate under a tall Banyan tree; more arrive every minute. I watched these tiffin carrying deliverymen sort out the lunch boxes at a frantic pace, then load the steel tiffins onto their bicycles and push carts. Soon groups of three or four dabbawalas push carts laden with hundreds of tiffins along the middle of the road. They’re all clad in long cotton loincloths called dhoti’s, loose cotton shirts and white wide-band Gandhi …