Writing a light wedding-day farce about a white, upper-class Ohio family in the Reagan years is more dangerous than you might think—it can’t be too trivial (because: Who cares?) and it can’t try too hard to not be trivial (because: Quit trying so hard!). But playwright and comedian Lewis Black, of Daily Show fame, kills this high-wire act, finding comedy in his characters’ frivolity and insight in their obliviousness. (ACT Theatre, 700 Union St, www.acttheatre.org, 2 pm, $45)