There's a lost sector at Thieves Landing on the Tangled Shore, called The Empty Tank. It appears to be an old bar, and there's still a music station in it that plays music and skips the current song when you interact with it. One of the songs it plays is "Hope for the Future", which was written by Paul Macartney for the game. I discovered this a while back (last TS flashpoint) and I find it awesome!
Was not expecting this post to blow up so much! This is my first post with a lot of likes and responses, so thanks everyone!