As a former Chicago theatre person (artistic and then executive director of Free Street Theater, from 1991 to 2003), I was glad to see American Theatre devote an article to the wonderful ensemble scene in Chicago (“Stronger Together,” AT, Nov. ’19). But I found it “curious” that the writer neglected to mention perhaps Chicago’s oldest functioning theatre ensemble, Curious Theatre Branch. Curious has been devoted to new work for more than 30 years, having produced Rhinofest long before the first “Fringe” for most of that…