Some places have great ambience. Others have terrific food. Think you can't find both in the same spot? Think again, then head to Leona's Sushi House. This hip spot has a variety of distinctive spaces that lure creative types and beautiful people.  Chef Shigenori Fujimoto has teamed up with Frank Leon and Evan Ross on a Japanese fusion menu that never misses a beat. Dishes are often irreverent, as in rich and savory udon carbonara with paper thin smoked pork belly, creamy egg and parmigiano; and the sticky-sweet oxtail-stuffed bao is craveworthy. Seafood is impressive, whether it's ceviche or sashimi-quality halibut bathed in a ponzu sauce vinaigrette. Chef's specials include shimeji risotto or whole baked branzino with sake.