"We pride ourselves on authenticity! Our members devote as many hours to studying Air Nomad philosophy as you did when you were training!"
— Xing Ying explaining to Aang the foundation of their club.
The Official Avatar Aang Fan Club was an organization consisting primarily of young women who adored AvatarAang and, subsequently, the Air Nomads. The members of the group were later taught the ways of the Air Nomads by Aang himself and became the Air Acolytes.
The next morning, Aang demonstrated some airbending moves to the members of the club, prompting the girls to fawn over him even more, much to Katara's dismay. Another of the club's co-founders, Yee-Li, then presented Aang with an airbender's flute that she purchased from a traveling merchant. Aang proceeded to play the instrument, causing the girls to shower him with adoration yet again. Katara then reminded Aang that their main objective was to find the Earth King, and the two left.
After Aang and Katara's meeting with the Earth King, they quickly planned to return to Yu Dao in order to get as many people as possible to evacuate. Overhearing their "mission", Yee-Li immediately sent a messenger hawk to her "sisters of the Yu Dao Chapter" to request assistance for the Avatar.
Aang later met the Yu Dao chapter of his fan club, which was more concerned about upholding Air Nomad traditions than the Ba Sing Se chapter. When the Avatar first met them, he thought that their tattoos were a disgrace to the culture of airbending mastery, and was frustrated with them. However as time moved along, Aang saw that they truly strove to live by Air Nomad traditions, and decided that he would teach them more about the cultures of his people. He eventually decided that from then on, the fan club would be no more, and would be known as the Air Acolytes.
The Official Avatar Aang Fan Club's Ba Sing Se chapter operated within a clubhouse located in the Earth Kingdom capital. Won-Yee designed the exterior to resemble the layout of the Western Air Temple, albeit loosely, with literally inverted structures and decor.
The interior of the clubhouse was decorated with several nomadic furnishings, including Air Nomad and airbending emblems, flying bison paintings, and posters of Avatar Aang.