So in my mind, at least one of the Mojave Scooby Gang has really… eccentric taste in music. Something that isn’t normal to the rest of the wasteland, which is used to Radio New Vegas 24/7. Maybe Boone really was Born This Way, or Lily could be Sexy and She Knows It, maybe Arcade is fond of little kids nursery rhyme songs (“Mary Had A Little Lamb is a MASTERPIECE!”) or who knows, maybe the Courier really likes old Russian folk songs. I know I do!

They type of music doesn’t matter at all, and neither does the team Six member who listens to it, but all of their companions should be very confused by the song(s) that they listen to, and it should be music that's not at all common in New Vegas.