Ask a firefighter about happiness and, sooner or later, they'll talk about their crew. Mike called the firehouse kitchen table "sacred" the place where they share meals, laugh, argue it out, and forge a bond that runs deeper than the job. Marty, whose brother served the Chicago Fire Department, confessed he always felt a little jealous of that brotherhood "a club I can't enter." And he made a sharp point: most businesses could learn a thing or two from that firehouse famil