The Ventura Area Theatresports group has been around for a long time and is run by a very talented group of folks. They are part of the Theatresports franchise (Keith Johnstone's group), and I highly recommend their performances and their workshops. The same folks also operate the Livery Theatre and so you can check in at for the latest info. Currently, their open workshops are on Saturday morning and Monday evening, and their shows are generally on Friday and Saturday evenings.