Well according to the dictionary anything at all that someone likes or is devoited to is a cult...
1: formal religious veneration : worship
2: a system of religious beliefs and ritual; also : its body of adherents
3: a religion regarded as unorthodox or spurious; also : its body of adherents
4: a system for the cure of disease based on dogma set forth by its promulgator <health cults>
5: a. great devotion to a person, idea, object, movement, or work (as a film or book); especially : such devotion regarded as a literary or intellectual fad
b. the object of such devotion
c. a usually small group of people characterized by such devotion - Cult - Definition and More from the Free Merriam-Webster Dictionary
So anything people are devoted to is a cult. I am good with that.