Generate Name Roster From Date Cells Marked "X"

I'm trying to come up with a solution to creating a roster of kids who've signed up for summer camp. In the attached example, Section 1 is a list of kids. An "X" under the date means the child is attending that date. If possible, I'd like to create Section 2 that is an automatically generated roster of any kid who has an "X" under a given date. As each child is added to the Section 1 list, their name would have to find the next available blank in the appropriate Section 2 list.

Section 1 formatting is not set in stone, so if I should reformat, that's fine.

Thanks in advance.

-Emily

Exactly the right solution. Thanks so much!