When he walks into a BKC restaurant with a trolley bag, dressed in jeans, a purple shirt, a thin silver chain around his neck and black sunglasses, Mame Khan looks more like the archetypal rock star than what he actually is - a supremely gifted folk singer who is putting the Manganiyar tradition of music on the global map. He's arrived straight from Pune after a concert there, which explains the trolley bag.