I have been teaching private martial arts lessons december of last year. I recently caught a cold and its draining my energy. If I do decide to cancel classes for the next couple of days, do I reimburse my students back for time off or what???
Give them a choice. Offer to make up the lessons + bonus a bit of time, or refund.
Most will take the lessons, so you end up with the money, those that don't, do not argue with them about it just reimburse them.