There should be a warning label--"not recommended for inexperienced actors"--on Nicky Silver's nasty little comedy about a group of New York neurotics making themselves and everyone around them miserable. Silver's dialogue has a sitcom glibness that makes it seem easy to deliver, but his wit is so mean-spirited that only the most adept performers can both get laughs and communicate the playwright's acid-tinged critique of American society. Most of the young actors in the newly formed Kick in the Face Productions don't seem comfortable enough onstage to mine the play's depths--almost all of them deliver one- or two-note performances. Sienna Macedon is particularly stiff and inexpressive as a woman whose husband might be leaving her for a man. Only Nathan Stoner comes close to capturing his spiritually wounded character, and even he doesn't come that close. Through 2/26: Thu-Sat 7:30 PM. Boxer Rebellion Theater, 1257 W. Loyola, 312-952-3852. $10.