Nick Hornby’s High Fidelity, a major hit in both book and movie form, isn’t faring as well on the stage. A recent trial run in Boston played to half-empty houses, and ticket sales are alarmingly slow for the Broadway production as well. “The problem, sources say, is that the show’s target audience – straight males in their 20s and 30s – would rather be caught in a gay bar than at a Broadway musical.”