Koreatown is a sprawling, urban polyglot of an area and it’s LA’s densest neighborhood. These days, it’s home to immigrants from just about everywhere. But Koreans have been coming there since the 1960s to take a swing at the American dream. One Korean family living in Koreatown seems to have struck out. They’re at the center of a new film called “Spa Night.” Their mom and pop restaurant has failed, and their mild-mannered teenage son takes a job to help out, cleaning up at an all-male spa. What he sees there opens his eyes to who he really is, even if that means not being who his parents expect him to be.