This New Millennium Theatre Company homage to the 1999 cult film Office Space should provide fans with plenty of nostalgic laughter, and it adds a few knockout funny songs. Other viewers are likely to find this uneven production less appealing. Adapted by Ian McPhaden and directed by Steven Attanasie Jr., the show starts off strong thanks to Meagan Piccochi’s patter songs, which evoke both hip-hop and The Music Man. Despite many strong performances–especially by babbling Guy Schingoethe as crazy coworker Milton–the play begins to sag as soon as the singing’s over, and by the end it feels as long as a Friday at the office. Through 12/17: Fri-Sat 11 PM, National Pastime Theater, 4139 N. Broadway, 773-989-4515, $10-$15.