To create a class with spot selection, follow the normal class creation steps > Classes > Schedule > new class > choose a template if required.
Name it, set the max participants, the duration, assign a teacher, and location. Then scroll to Spot selection, flip the carrot, and toggle this on.
If you don't already have a room create, click 'Add new room' and add as many spots as the Max Participant figure you typed earlier. Consider adding objects like doors to help customers orient themselves when choosing a spot.
Customers will be prompted to choose a spot when signing up. You can test their experience after creating the class by clicking the sign up link that you'll see on the class details page.