Hello all! I have a question from a friend. They have been employed as a gymnastics instructor by a gym in South Carolina for the past few years. Each year the gym hosts an expo and requires all employees to work at the event. However, my friend has never been paid to work the event, and to the best of my knowledge none of the other employees have either. My question is, can this employer legally require employees to work an event without pay? My friend is a part time employee of the business and the employer withholds federal taxes, so they are not independent contractors.