See who's attending an event

From your 'My Hub' page (please see below)

On the left hand side of your account, you will see the side menu where you can select 'Calendar'.

This will show you an overview of that month's sessions/events

Here you can click on the event and then the arrow  to 'View'

Where you can see all contacts who are attending that event.

Please note: Clients can book into an event at any point up until the event has been started/completed by the trainer.