I think that maybe by Wednesday things were back to normal... Maybe Bender took Alison to one of his "heavy metal vomit parties" the following weekend, but that would be about the end of it...

Allison was a loner so she'd get a makeover from Claire, "borrow" some nicer clothes, and date Andrew.

Andrew would loosen up around Claire, Allison and Bender but he would still act the same around everyone else. Allison would probably get sick of it at some point, so they'd break up around graduation.

Claire would keep Bender around to get to her parents and Bender would enjoy shaking up the status quo, but their fling would never get too serious. I could see Claire and Allison staying good friends.

On Monday everyone would nod and acknowledge that detention did mean something to Brian but as the days and weeks pass, they'd ignore him.

Collective peer pressure would suck Andrew and Claire into their perspective cliques, while Brian and Allison faded into their introverted backgrounds. Bender is so cynical, he'd be back to sociopath/bully status an hour after raising his fist on the football field.