MAHABALIPURAM, India—B. Vivekanandhan, the 51-year-old owner of a popular restaurant called Moonrakers, competes fiercely for customers in this southern Indian holiday town. So fiercely, in fact, that fists have flown.
His chief foes are his own flesh-and-blood. His older brother operates a seafood joint called Moonwalkers right across the street. Just down the same lane, his younger brother runs Moonrocks. The menus are nearly identical.
