The jazz ensemble - which includes a rock guitarist - performs a clashing riotous discordant fusion of styles because that reflects reality.
People clash, cultures clash.
This is a film that unfolds slowly.
The music and the background setting and film-noir cinematography float the viewer through a metropolitan cross-cultural city (British culture, American culture, Asian culture, Polish culture, for example) where we watch several normal people become entangled with each other as they soak up city life and witness without interest a common political event (Kate has no interest in the event, she is being blackmailed into "servicing" the delegation).
Organized corruption interrupts their monotone existence, clashes occur, American globalism is criticized, music wafts up from the streets and crawls through the windows, violence is stylish, and life goes on.
Several outdoor city scenes show areas that are all Chinese/Asian restaurants.
Incidentally, Newcastle, the metropolitan melting pot city where the film occurs, not only has a large Asian population, Newcastle-Upon-Tyne also hosts a large populace of Bolivians and Pakistanis.