If you have been one of the many theatergoers who have been around Chicago’s local theater scene since its re-emergence in early 1970s, you should appreciate Steppenwolf Theatre’s current play, “The Minutes,” written by Tracy Letts and directed by Anna D. Shapiro about a strange city council meeting in the fictional town of Big Cherry, somewhere in middle America.The 90-minute, no-intermission production, which has been extended to run through Jan. 7, features six of that company’s veteran …