Tomorrow it's someone at work's leaving party, and we'rre going to a karaoke bar, where you sing to a live band! How ace is that!

However, they have neither of my staples (Suspicious Minds and Common People for those interested) so I've narrowed it down to the following

When You Were Young (I've been sporting a crap beard for several days now and have several waistcoats)

Disco 2000 (no Common People, but I do a mean Cocker impression)

The Day We Caught The Train (I won't hit most of the notes, but some kind of sing a long may mask my inability to sing?)

Opinions, racial slurs and ransom notes welcome