No. You can't say that people are 'no fun' if they don't know or like a song. I don't think it's beneath me, but how could I join in a song which I not only do not enjoy, but also do not know the lyrics to? Besides which, I am complaining generally about the annoyance of people declaring this, because it's stupid. It's claiming that everyone should have your taste, and that anyone who doesn't is no fun, and it's a particularly annoying and stupid way of doing it.
Also nice of you to keep the tone light, fresh and happy by telling me to fuck off and calling me a cunt. Great going there. I purposefully did not insult you personally, starting to wish I hadn't bothered now.