Land on a mainstream classic rock radio station anywhere in the U.S., and chances are it’ll sound quite a bit like classic rock radio everywhere else. There’s a good reason for this: In many cases, playlists are determined not by individual DJs or regional flavor, but by programmers or consultants. Plus, there’s an aversion to challenging listeners, as there’s a commonly held theory in radio that people will turn off things that are unfamiliar. In other words, radio would rather reinforce tastes than cultivate new ones.