Drop-in Column on "Classes" Page

What specific challenge or problem does this idea solve?

Being able to see how many students are registered to drop into each class. Especially for those who have a punchcard.

How should this work?

Add a column for drop-ins. While you're at it, maybe a column for trial classes also.

Who will benefit (Admins, Staff, Students)?

Admins, staff, students who register will know how many available spots are in the class..

How will this change impact your daily tasks or overall experience?

It will make it easier to identify how many students are to be expected in an adult class.