Hint for the clue that begins, “Down jazzy side streets…”

Remember the game instructions: there’s probably a purpose for every item you’re given for your quest… including that quarter, which just so happens to be the exact amount that’s needed to get a fortune from Fortune Red. Once you do, there’s a bunch of pirate flag designs on one side, each with their own number. Each two-flag set creates a two-number set, which is exactly what you need to solve a Greek Square cipher. The first number is the column you’ll need. The second number is the row. The intersection produces a letter. Happy hunting.