If you use Per-Day classes, you can also offer new customers a choice of days using the Online Registration Form. This is especially useful for week-long Summer Camp classes, where you offer a selection of which days during that week the student wants to attend.
For a full explanation of setting up and using Per-Day classes, see Adding Per-Day classes.
In this example of a Camp Week where the parent can attend any combination of days, notice the class is set up as a week-long Per-Day class, and the maximum size is set at 8 students each day. 
If this class is selected online via the Registration Form, the parent will be able to select which days to attend. If a day has 0 openings, it will say Full and can not be selected. However, if you use online waitlisting, the parent will be able to either select available days to be enrolled in or to select to be waitlisted for any full days.
At this time the parent can only select ONE bulleted choice - there is not a way to Enroll into open days and Waitlist into full days at the same time.
Once submitted it will update your database just as regular class online enrollments do. The confirmation email to the parent and to you will show the Days selected as well. Note: If a student is signed up for a per-day class, only a Jackrabbit User can add additional days.
