In August, the 61-year-old Edinburgh Festival Fringe, the largest arts festival in the world, dominates the city, taking over theaters, pubs, churches and just about every other performance space and attracting hordes of tourists and spectators - the population reportedly doubles during Fringe time. The Fringe is actually one of several festivals going on simultaneously - including film, book and jazz festivals - which all add up to what its called the Edinburgh Festival.