Thursday, July 11, 2002 Bar business sparks back up By Jason Tait Eagle-Tribune Writer HAVERHILL -- A half-hour after the city suspended the smoking ban, an electronic sign in front of Mr. Mike's Restaurant beckoned passersby with the words "Smoking is Back." It worked. Inside the restaurant, owner Michael A. Difeo III watched something he has not seen for four months -- a bar packed with customers lighting up cigarettes, gambling on Keno, and enjoying sports on TV as they ate and drank. "I've been closing an hour early every night for four months," Difeo said of the...