Cheap? Need a Schadenfreude fix? Just wanna see some comedy? If you answered yes to any of those, hie thee to Second City (1616 N Wells) this Sunday, September 18, at 2:30 pm for a free U.S. Comedy Arts Festival Showcase. (That is, it’s an audition for the festival for the groups performing.) In addition to the Schad, the truly phenomenal Michael Lehrer will be doing some of his solo work, and some Second City groups will be performing.