I haven't seen this here yet, and it deserves immortalization. Kristen explains how the book club will work, in her own special way, in Lightbulbs:
Okay, Allyson here is my NSYNCified version of what JenP said:
Let's imagine for a moment that instead of a Book Club Thread, we were talking about...a Popslash Fic Round Robin Writing Thread. So instead of "genres" you have pairings. The first month, we're gonna write JC/Justin fic. Everybody throws out ideas on what story we should write for JC & Justin. So one person says they want a Coming of Age/First Love Story in Germany. And someone else says they want a present day "Justin is an evil diva" fic. And someone else says they want a "JC is a kinky motherfucker with a heart of gold, yo" fic. And Plei wants this cracked out AU where JC is Batman and Justin is the Boy Wonder and Chris is, like, Alfred or something. And ita keeps wandering around saying, "Why isn't it a Chris month yet, damnit?"
*ahem*
So after everyone's shared what they'd like to write, the field is narrowed. Plei's cracked out AU is tossed because, you know, CRACK. And everyone ignores ita because, hi, it's JC & Justin month. Which leaves us with three options. Those three options are put up at MrPoll or what have you and the slashers vote.
Most votes win. And everyone starts writing about how JC is a kinky motherfucker with a heart of gold, yo.
Next time around, it's the same thing only we're focusing on ideas for the pairing of Lance & Chris.