<p>As Mom2M said, they do hold spots in some classes for each orientation session but also remember that people are going to be constantly adding and dropping until the end of the 3rd week of class. Even if its filled up now, chances are a spot will open up eventually.</p>
<p>A couple of times when I was on waiting lists for full classes, they created an additional section and enrolled everyone on the waiting list. Other times I just went to the first class and enrolled then. I never had a problem getting the classes I needed.</p>