For many growth-minded restaurateurs, success is about national domination. But for others, being a  game changer close to home is the greater reward. These entrepreneurs are developing the local dining scene, setting trends and standing out as the ones that everyone is watching. From heads of regional chains to independents, this year's Power 20 spotlights leaders who are on an ongoing mission to build up their home markets and give guests a reason to come to—or stay in—town.