In the U.S., what term is often used to describe workers who have irregular hours and no access to benefits?

The term "casual employee" accurately describes workers who often have irregular hours and typically lack access to benefits. This kind of employment is characterized by a flexible schedule that can change frequently, and these workers are generally not guaranteed a certain number of hours each week. Consequently, they may not qualify for benefits such as health insurance, paid time off, or retirement plans. Casual employees are commonly found in industries like hospitality, where flexibility in staffing can be necessary to meet fluctuating demand.

In contrast, seasonal workers are employed for specific periods, such as during peak tourist seasons, but their work pattern is more predictable compared to casual employees. Part-time employees usually have a more regular schedule than casual employees and may have access to some benefits, depending on the employer's policies. Interns are typically students or recent graduates who work for a company for a limited time to gain experience; they may or may not be paid and often do not have regular hours or benefits associated with employment. Thus, the defining characteristics of a casual employee make this choice the most fitting answer.