Hasselhoff Continues to Show Up at Things• High Fidelity opening night. Imperial Theatre, 249 W. 45th St., nr. Broadway, 5:30 p.m. Nick Hornby, Hope Davis, Alec Baldwin, Rachel Dratch, Lauren Bacall, Bebe Neuwirth, and David Hasselhoff expected. Free premise for aspiring “Shouts & Murmurs” writers: What if Nick Hornby had written Baywatch?