There were many famous harem clubs in the ACG world, some of which included: 1. Index of Forbidden Magic Books: The members of the society founded by Dangma Uejo include Dangma Uejo and his harem. 2. Life in a different world from scratch: The members of the club founded by Rem include Rem and her harem. 3. Sword and Sword God Realm: A society founded by Kirito, including Kirito and harem members. 4. Love Asteroid: A club founded by Ashley Atwell. Members include Ashley and her harem. 5 Legend of the Legendary Brave: A society founded by Rudius Gellerat, whose members include Rudius and his harem. These are some of the famous harem clubs, and of course, there are many other clubs, each of which has its own unique characteristics and membership.