Mar. 18 & 25. All invited to perform improv (sign-up on arrival), or just to watch. No experience necessary. Followed (8–9:30 p.m.) by “An Evening of Improv” ($15 at the door only) featuring a debut performance (Mar. 18) by Civic Improv’s still unnamed new house team and regional guest troupes (Mar. 25). 6–7:30 p.m. Civic Theatre, 322 W. Ann. Free. [email protected], CivicImprov.org.