ROXBURY, NJ - Many comedians use their bodies on stage to draw laughs. The performers of Off-Book! Improve have one part they use more than others: The tops of their heads.

Appearing Saturday, Feb 7 at the Investor's Bank Theater on Eyland Ave., Off-Book Improv's performers don't have time to think. As members of an improvisational comedy troupe, they're job is to be funny on the spot, off the cuff, on the fly, at the spur of the moment and, generally, unprepared.

Their so-called "PG-13 performance," presented by the Roxbury Arts Alliance, starts at 8 p.m. Tickets are $15 and available online or at the door.

The theater is at 72 Eyland Ave. in Succasunna.