In one 15-square-block swath of this metropolis on the Pacific, you can catch exhibits from cutting-edge contemporary artists, have dinner at one of the country’s best Vietnamese restaurants, browse rare books and prints, or shop for one-of-a-kind housewares, fashion, and ephemera at effortlessly cool vintage boutiques-all against a cinematic backdrop of midcentury architecture that feels frozen in time. The neighborhood isn’t in Los Angeles, San Francisco, or Seattle, though. It’s Honolulu’s Chinatown, about five miles west of tourist-saturated Waikiki, near the courthouses and government buildings of downtown.