Harley Davidson. Yeah, I know it’s not a “car” culture, but the amount of dedication and loyalty to this brand is worth the exception. I don’t know of many other car cultures that has such rapid indoctrination than the orange and black shield. I know of no other brand that you could go into a dealer, completely naked, and come out with not only a vehicle, but a full set of clothes, riding gear, accessories for not only your bike, but also for your living room and gas/charcoal grill.
Sure, Ferrari or Porsche might have the same degree of merchandise, but they aren’t considered the working man’s vehicles, despite being on the upper end of motorcycle prices.
And they can organize so quickly. Sure, most may only ride about 100 miles per year, but when they gather, they gather in force.