Somepony decided that the Grand Galloping Gala was the place for polkas and par-tays. When the actions of six friends bring an end to the annual party in Canterlot, the musicians are left with hours of free time they didn't have earlier. Octavia wasn't the only musical mare on stage that night, so what did the others do with their nights? And how does Bluenote get out of that sousaphone?
Story ended abruptly because I forgot what I was doing with it. Consider it ended, because I don't feel I could have done more with it without significantly altering the story.