First, there's Facebook — a widely used app that basically put "hacker culture" on the map in Silicon Valley.
Facebook is known for moving fast and breaking things. In a sense, they are the original "powerhouse" hacker haven. Everyone knows about, and uses, Facebook. As a bonus, its CEO Mark Zuckerberg is known for wearing a hoodie basically 24/7 and hanging out in San Francisco's Mission District.
...which sounds a lot like Arcade Fire, the powerhouse indie band that pretty much everyone knows about.
Around the same time Facebook was taking off and getting ready to go public, a band called Arcade Fire released their third album, The Suburbs. They went on to headline music festivals and brought indie to the mainstream.