Detailed listings for nearly 150 concerts, festivals, open mics, jam sessions and musical workshops slated to take place during September and October in Brooklyn, Queens, Nassau and Suffolk counties appear in this installment of AcousticMusicScene.com’s Long Island AcoustiCalendar. Editor's Note: Links to Websites covering other parts of the New York metropolitan area, the Northeast, and beyond appear in the Regional Calendars section of AcousticMusicScene.com [To view the Long Island AcoustiCalendar, click on the headline.]