Reviewing the Neo-Futurists' signature show is difficult: not only does the cast change frequently, so do the scripts. Every week company members roll dice to determine how many of their 30 short plays--which they aim to perform in 60 minutes (a timer cuts them off after an hour)--they'll trash and replace with new ones. Since all scripts are written by cast members, the show is constantly being reinvented, springing off incidents in the news and the performers' own lives to produce an evening that's consistently funny, challenging, thoughtful, and silly--and occasionally brilliant, like the one I saw recently. Performed by younger members of the ensemble, it was infused with high energy and good cheer, including such interactive bits as asking an audience member to smash an egg on his forehead. It was also surprisingly political, with plenty of antiwar and feminist plays. Special mention goes to Rachel Claff, whose solo work "Reduced (or Not That I Won't Feel Differently in a Week or Two)," about remaking one's body and self after a breakup, was so poignant that women in the audience were cheering her on. Neo-Futurarium, 5153 N. Ashland, 773-275-5255. Open run: Fridays-Saturdays, 11:30 PM (doors open 11 PM); Sundays, 7 PM (doors open 6:30 PM). $5 "plus the roll of a single six-sided die" ($6-$11); "no reservations are accepted."