From their event page:

Our Learn to Ride classes are for anyone 18 and older who want to learn how to ride a bike. They run monthly from April to October. Classes have seen a mix of high school students, graduate students, retirees, working professionals. Some people have had some experience riding a bike as a child, others have never been on a bike.

Whatever your experience or age this class is a positive and encouraging setting to start building your bike riding skills.