For me, it's social dancing, specifically West Coast Swing. Because while there is just social dancing, and some who only do it, there's a bit of a culture of competition, and it has its own governing body for determining where you place in competitions, and when it does sound like a cult when described.
I just went on a commie wall of text posting spree sort of venting about the current political conditions in the US regarding people cucking up to either the Dems or the Reps and after posting I sort of looked back and realized it does look a bit culty if you are still drinking the proverbial Kool-aid lol