My idea came from a project called (originally called Access Nashville) but is now called AccessMusic City. My former boss originated the idea, but not in the form of an app. The project works with the Nashville's Tourism Board to promote businesses that are disability-friendly. I'm not sure if we can send private messages on OpenIDEO, but I would like to exchange emails.
Access Music City Website: http://empowertn.org/programs/accessibility/access-music-city/