"a preponderance of oldies"
Nice one! That qualifies for inclusion in the list of collective nouns along with:
A Murder of Crows,
A Parliament of Owls
An Exaltation of Larks
A Preponderance of Oldies.
I was no good at psychics at school, the teacher put me in the bottom set. This meant that when most of my classmates were doing psychics I was in the lab next door doing Chemistry with the remedials. It had its compensations though. So skilled was I at mixing potions that no one ever really knew that the resulting smell was from my concoctions or the fact that I had just farted.