User blog comment:Zathronas/Analysis by an author: Volume 2 episode 5: Extracurricular./@comment-25358959-20140829142259

Since I don't see Cinder as taking the weekend off to just go to some dance, her last line ("We have a fun weekend ahead of us.") makes me think that she's planning on doing something at the dance that has to do with that list and the needle. My guess is she's going to suppress (temporarily as it's likely all she needs) the semblances of those they've been scouting as the best fighters and then ambush them while they're on their missions in order to eleminate (in some way) those who may try and get in the way of whatever her ultimate goal is.