A while back, Chicago's cutting-edge improv theater Under the Gun culled thousands of new show ideas from its legions of loyal fans. Now, based on nothing but a title and a tag line, the eight best of those ideas go head-to-head in a bracket-style tournament of conceptual improvisation, with the audience voting on which one will go on to the next round. As the tournament enters its semifinals, come see hilarious improv-idea match-ups such as "Porn Minus Porn" vs. "Quarantine" and "It's Your Funeral" vs. "Serial." It's not only entertaining, it's interactive, as the eventual champion you help crown will be the impetus for the Under the Gun's next full-scale production.