Classes vs Courses

Can a user only be registered for the Class and not the Courses within? Here is my use case: I have a class "Painting 101" that I want to have weekly classes for of which class day(s) are TBD (To Be Determined) I'd like to allow 75 in total to sign up After sign-up, I'd like to then assign the signed-up users to one of 3 different days/times (limiting each class to 25 people) If I set up Painting 101 as a Class, with Courses on M, W, and Fri, it will automatically assign anyone who has signed up for Painting 101 to all three days. Can I simply have them signed up for Painting 101, and then manually add the people to the M, W, or Friday course (aka mini-class)?