So I'm actually thinking about personified instruments again.
Each of the Sections has a unique governing body. The Strings are ruled by a monarchy, lead by the Queen Concertmistress and her royal council (Violin, Viola, Cello, Bass). One must greet her with a bow/curtsy and a refer to her as "Your Grace" "Or our greatest mistress" or something. It's rather strict. She's engaged to Cello.
Winds are a democracy. The five provinces (Flute, Clarinet, Oboe, Bassoon, and Saxophone) are ruled by 5 Principals (mayors) that meet at the Parliament building in the capital city, Reed, to pass bills and discuss what is best for the Section. Often, principals will marry in order to ally together their provinces.
Brass are a military style-government. All citizens work on a strict schedule. Adolescents are subjected to military-style schooling, involving vigorous physical training from a young age. All citizens are expected to serve when needed. The Brass are lead by their Brass Army, with the head being General Tuba (oversees Tuba district), along with associates Lieutenant General Horn, Sargent Trumpet and Sir Trombone.
The Grandes are a very right-wing capitalist society. Ruled by the CEOs of the five largest corporate brands (Piano, Harp, Harpsichord, Percussion, Organ), citizens are subjected to marketing and generally the social class gap is rather wide in most districts. Each brand specializes in one area of production (Percussion - media/broadcasting/arts, Piano - technology/development/research, Harp - Food, health, fitness, wellness, Harpsichord - energy/electricity, Organ - manufacturing/processing including textiles and products). Income and profit are priorities. They have no army, the old defense mechanism being a giant wall surrounding the Section.