The answer is New Orleans. It is the city in the United States considered as the birthplace of the Jazz music even though this spread also in New York. New Orleans music usually was played by bands since it focused more on group playing.
The event that most likely due to the 1860 presidential election of Lincoln was The Secession Of Carolina From The Union.
This is probably a joke but I'll answer anyway
By 'cheeks' they mean buttocks so by "making them clap" is referring to them being so big/thick that they clap or make noise when you walk or move around or something.
I probably got played lol but whatever