The comedy of Groucho Marx--based largely on inspired insults and chaotic wordplay--was never what you would call tender. This biodrama by Groucho's son, Arthur Marx, and Robert Fisher seeks to show that the man did indeed have a heart, and a heavy one, full of worry and regret. It's pretty much the standard tears-of-a-clown approach to telling a comedian's life story. In this Chicago Jewish Theatre production, Marshall Stern's melancholy Groucho isn't terribly funny, but he does have depth, combining the wiseacre we know with the sad sack we don't. Through 11/20: Thu and Sat 8 PM, Sun 2 and 7 PM. Red Hen Productions, Kenneth LeTraunik Theatre, 5123 N. Clark, 773-728-0599. $20-$25.