No surprises here: Dan Goggin's new "Nunsense" musical features groaner puns and silly songs ("Matzo, matzo man"). The Little Sisters of Hoboken are taking an ecumenical cruise when the entire cast of Fiddler on the Roof--except the guy playing Tevye--gets sick, so he and the nuns put on a show (but not that show). Goggin's amateur theatricals can be charming when Chicago Jewish Theatre embraces its own limitations, as in "Das Boat," a ridiculous take on shipboard dramas that features a stuffed octopus and waves painted on fabric. But attempts to deliver on the powerhouse closing song, "Rock the Boat," fall flat, and of the five performers only Darci Nalepa as Sister Mary Paul (aka Sister Amnesia) has a surefire comic touch. Worse, the play can be offensively simpleminded, as in its sing-along synopsis of Fiddler: forget the pogroms and just feel the love vibes. Through 12/19: Thu 8 PM, Sat 8 PM, Sun 2 and 7 PM. Wed 12/8, 2 PM. Red Hen Productions, Kenneth LeTraunik Theatre, 5123 N. Clark, 773-728-0599. $20-$25.