The folks who make up this professional comedy troupe never fail to leave audiences rolling, and their act is a terrific reason to go out for the evening. Indeed, fans of improv have been heaping praise on Ad-Libs since the group first tread the planks back in 1986, and their completely unrehearsed routines have certainly caused more than a few sides to split over the years. If you go (and you should), keep in mind that comedy isn't something done to you ... the cast needs and thrives on audience participation.