“You know it’s gonna be a long night when you hear this chord,” Fred Armisen declared from the stage of Ann Arbor’s Blind Pig on Monday night. With a single, embellished strum on his Ciari electric guitar, the crowd burst into laughter. “That’s an E minor,” he said. “That’s too serious of a chord.” The former Saturday Night Live star and actor of “Portlandia” fame brought his “Comedy For Musicians But Everyone is Welcome” variety show to the downtown venue Oct. 9, performing music and comedy for a sold-out crowd and reflecting on rocking out in Ann Arbor in the 1990s with his Chicago punk rock band Trenchmouth. Read the story.