Sisters of Perpetual Indulgence* who sometimes ride, sometimes crew, and who join the riders on the Ventura Beach candlelight vigil (see below)
Some social scientists have credited this book and a 1982 pamphlet called Fair Play! by the Sisters of Perpetual Indulgence as being the first literature to recommend safe sex as a strategy for reducing the risk of contracting the transmitting agent which causes AIDS.
Sisters of Mercy | The Andrews Sisters | The Sisters of Mercy | Three Sisters | The Pointer Sisters | Sisters of Charity | Sisters of St. Joseph | Big Brothers Big Sisters of America | Sisters of Notre Dame de Namur | Three Sisters (play) | Sisters of Providence | Mindless Self Indulgence | Marist Sisters | Boswell Sisters | Sisters | Little Sisters of the Poor | Franciscan Sisters | Brothers and Sisters | Wyrd Sisters | Viennese Singing Sisters | The Lennon Sisters | Sisters, Servants of the Immaculate Heart of Mary | Sisters of the Immaculate Heart of Mary | Seven Sisters station | Lane Sisters | Big Brothers Big Sisters | A Tale of Two Sisters | the Lennon Sisters | Sisters of the Little Company of Mary | Sisters of St. Francis of Perpetual Adoration |