Thirty years ago this September, a devastating fire tore through Hobby’s, scorching the ceiling, damaging the kitchen and forcing the iconic Newark delicatessen to shutter for nine months. When Hobby’s finally reopened in spring 1993, lines stretched around the corner and down Halsey Street as devout customers waited two hours for the deli’s prized pastrami. “You just couldn’t keep up,” co-owner Michael Brummer told NJ Advance Media. “We were killing ourselves, doing the best we could.” Flash forward three decades and Hobby’s, an enduring New Jersey food institution — and one of few downtown N…