In the in class view tap Cancel class to cancel a specific class.
By default, "Inform participants" and "refund passes already claimed for this class" are selected. Tap the circle beside either to deselect them.
Either write in the textbox what you would like to say to everyone booked into this class, or leave it blank or write something brief and tap PIA above the textbox for our AI to write a message to everyone. Change the message to what suits, and then tap "cancel this class" to cancel it, and optionally inform participants and refund passes.