Go to the cafeteria.

You wait until the group leaves, as to not look suspicious. The reputation of a eavesdropper is definitely not something you'd like. As they wander of the school, you decide to go through the student zone and make your way to the school's basement and thus, the cafeteria.

Nothing much there. Just a series of empty tables, a few bags left behind and a whole lot of litter. Lunch break is nearly over, so the cafeteria lady isn't even there.

It's completely empty.

RIIIIING

The school bell rings, telling you that class is starting in just ten minutes. Better get to class and not be late.