Leads Steve Tomlitz as Claude and Zach Laliberte as Berger don’t have powerful enough voices to knock their solos out of the park in this quintessential antiestablishment piece, but that’s almost beside the point. Hair redefined the American musical, focusing more on complex themes than characterization, and Tomlitz and Laliberte are skilled enough to elicit the requisite sympathy for their characters. Director Danny Bernardo’s choreography works well within the constraints of the space: the terrific ensemble (including Natalie Levine as debutante Sheila) plays to all sides of the stage and moves into the seating area tactfully, advancing the theme of all-inclusiveness. Conceived during a Columbia College workshop in the aftermath of 9/11, this Tonkawa Theatre Tribe production has an incredibly potent political message, while the company’s attention to craft and detail makes it a stylish labor of love to boot. Through 3/6: Thu-Sat 8 PM, Sun 7 PM. Strawdog Theatre Company, 3829 N. Broadway, 773-857-0554. $12-$15.