Well, what a coincidence:
Either you're really smart at looking busy or you're about to get a call from personnel and a brown envelope containing your P45. On the plus side, you always buy a round in the boozer and you have the latest showbiz gossip in the office, so you're perennially popular.
I'm not sure how accurate the 'always buy a round' claim is, but as for being pernennially populare, thanks for noticing