With Chicago being a key city of the “blog era” in hip-hop, J. Cole’s bond with the Windy City was, and remains, strong. The rapper was one of the artists to break out during this transformative period in hip-hop culture. Sixteen years after dropping his first album, “Cole World: The Sideline Story,” he’s become one of the most revered and successful rappers of his generation. “The Fall-Off World Tour” is an endearing homage to both J. Cole’s lo…