Though most of Sean Grennan and Leah Okimoto's musical about the marital trajectory from naivete through cynicism to tender rediscovery is taken from the recycle bin, occasionally it surprises with a zippy line or inventive scene. And the ensemble rises above even the most tired material, especially Gene Weygandt and Kathy Santen as the weary midlife couple, extracting laughs from cliched parental dynamics and (God save us) Viagra jokes. As newlyweds, Kelly Sullivan and David Larsen transcend wide-eyed stupor to find moments of genuine poignancy (particularly in a song about the loneliness of business travel). Dual-pianist accompaniment contributes to the in-timate, comfortable atmosphere, which anyone who's worn out a DVD of Father of the Bride should find pleasing. --Kim Wilson Buck a Through 9/2: Wed 1 and 8 PM, Thu-Fri 8 PM, Sat 5 and 8:30 PM, Sun 1 and 5 PM, Marriott Theatre in Lincolnshire, Rte. 21 (Milwaukee Ave.), Lincolnshire, 847-634-0200, $42, dinner-show packages available.