For a brief moment in the summer, fans of the Rome’s Lazio football club were united in declaring that in order for the club to survive, its owner, Claudio Lotito, must go. Lotito’s sin, according to supporters, was not using enough cash from his office-cleaning business to buy star players. So far, so normal, for top-flight football. But it was a new low for Lazio, which has never had the same support as its Rome rival AS Roma but enjoyed a glorious era in the 1990s. It began with the arrival of Paul Gascoigne before the club won the Italian league title in 2000 under manager Sven-Göran Eriksson, the Swede who would go on to manage the England team. The July protest offered a snapshot of how politics, show business, football, economics and sometimes criminals are linked in a city where it often feels like everyone knows everyone. As a result of the club’s malaise, and its owner’s alleged failure to spend cash, supporters have boycotted home games this year, giving the Olympic stad...