After the unusual promise of Say Anything . . . , Cameron Crowe’s 1992 second feature as a writer-director, another romantic comedy, is so lightweight that you’re likely to start forgetting it before it’s even over. (Could the earlier movie’s distinctiveness be attributed in part to producers Polly Platt and James L. Brooks?) The skimpy plot follows half a dozen singles (Bridget Fonda, Matt Dillon, Campbell Scott, Kyra Sedgwick, Sheila Kelley, and Jim True) who drift around Seattle.