In William Olsson’s “Lost Girls & Love Hotels,” Margaret (Alexandra Daddario), is spiraling out of control. An American expat living in Japan, the young woman spends her days fighting off a hangover, barely competent enough to hold a job, and her nights drunkenly talking in bars followed by late-night sexual encounters with strangers. Rinse, repeat. Margaret isn’t doing well. And the last thing she needs is a wild, passionate affair with a gangster that is surely going to end in heartbreak. Or maybe, that’s exactly what she needs.