Last week I was at a small garage fixing my little hatchback. The owner never posted a single reel. Yet cars kept coming in like it was planned. There are so many garages that barely get a few cars a day, even though their place looks modern. But this place was full. So I asked the guy who did my brake lining how they get so many customers. He smiled and said, “Our regulars bring their friends.” That’s the real play. And he’s right. The reason I was actually there was because one of my...