A guest-style chair is a chair with typical features like standard legs or a cantilevered metal base. They are generally comfortable and often served clients in business meetings around a table or on an executive desk's visiting side.
If you plan to use a guest-style chair at your desk, it should have an upright back or a tilt feature because some cantilevered chairs have slightly backward tilt, which makes the user on such a chair likely not to reach their desk.