Is there a general rule to derive this sort of colloquial despective nouns:
- schreiben → das Geschreibe
- rennen → das Gerenne
- schreien → das Geschrei
I wanted to form that from sing but Gesang already exists, and it means of course something else, and Gesänge sounds like its plural. On the other hand Sängerei is my best option, but not having this Ge-, common to the others, I'm not sure at all if it would be understandable.