Bonnie Brosious is proud of her ability to not only lure big-name acts, but also to identify those on the rise and book them, hoping their popularity crests by showtime. It was one of the saddest days in rock history, and Bruce Springsteen responded with a show that would become legendary: a 34-song concert dedicated to John Lennon, who was slain by a deranged fan on a Manhattan street the day ...