I was thinking about this on my drive home and I need to type something that doesn't make my stomach hurt, so:
What's your favorite memory of being in a group singing something? Mine is possibly an only-teenagers kind of thing, being on a school bus for a field trip (I think it was a summer session at Phillips Andover) and someone playing "Under the Bridge" by the Red Hot Chili Peppers on a boom box and everyone, just everyone, joining in for a perfect hair-on-back-of-neck raising moment of all being in sync.
(Yes, that is very teenager, isn't it. Also, I bet kids don't bring music devices with external speakers on school buses any more, even if it's a team bus.)
(I was thinking about this because "Landslide" came on, which was one of the songs we sang outside at Readercon this summer, which got me thinking about what makes a good sing-along song without recorded music, which got me here.)
Anyway. For those of you of an appropriate age, have some nostalgia.