Have you ever been to a Science Fiction convention and gone to the filking.
Filking began as a fun group activity. The songs were simple. We all knew the words. If we didn't, there was always a filk song book.
But NOW! There is a collection of filk stars who are convinced that they're Judy Collins, Joan Baez, Simon and or Garfunkle. You do NOT join in the chorus. It can not, really, be said to be fun. I wouldn't be rude to these egotists. But I'd give a lot to sit in a room and sing along to "Real Old Time Religion" or "The World Con".
I might mention that one filker translated the infamous Greek Sailor Song into classical Greek, so he could sing it in mixed company. Nobody cared much to sing along, but we all enjoyed it.