some of your arguments against the statement seem a bit too far fetched for example : C note providing conveyance to its patrons.
Not a very strong reasoning. One wouldn't under normal circumstances go to a jazz festival if he wasnt interested just because the tickets were cheap and it fell on a holiday. You could have argued instead that there is no data regarding the number of people from Monroe who attended the fest. It just might be that most of the people who attened it were from some other locations.The author states the strength of the jazz festival to be a very good example of the interest people of Monroe have in jazz but it could be that the festival’s timing could be such which could have enhanced the strength maybe the festival fell during holidays, the entry fee could have been very low, the festival could have been more attractive due to the fact that the management of the festival had decided to invite a plethora of celebrities so that people might have come to view the celebrities instead of the festival itself.
You last two points which seem to be the strongest are underdeveloped. Also, its a good idea to suggest ways to improve the argument in your concluding paragraph.
That said, you seem to have a decent vocab. Just work on your structure. I cant rate your essay as Im just a beginner at argument analysis myself, but your analysis failed to convince me, and thats the reason for this comment :-). Best of luck mate.