At the most basic level, Circles exist to serve individuals, families and community organizations, especially òrìsà temples. The key leaders in the Circle are the Catalyst, the Supporting Catalyst, and the Senior Advisor. The Catalyst presides over the Circle's executive members, who manage the annual program of activities, the most important of which is the Ijinle. The Ijinle is a weekly support group about Personal Priesthood, as defined by Òrìsà Lifestyle. While each Circle will be different, it is expected that most will have one or more vice advisors, a secretary, and a treasurer, as well as committee chairmen responsible for various aspects of the Circle's program of activities. Many Circles, especially large ones where additional structure is necessary, can also have chapters.