To play «
backseat DJ,» you first
need to connect your Spotify account with your Uber profile; when you request a ride, a music bar will appear at the bottom of the Uber app and you can select a playlist from your Spotify account while you wait for your car to show (although this only works if you get a music - enabled car, a detail that's apparently stressing out Uber
drivers with older vehicles who fear they'll be penalized for not offering the service).