I toured with my rock band for two years after college, although I can't really point to much that I have "accomplished." Besides rocking the @#$% out, of course. I put it on my application, although not in those terms, if only to explain that I didn't disappear for that time. I'm a bit nervous about getting a "square" interviewer who thinks it's silly, or who thinks I'd rather be a rockstar than a physician-scientist-star. But the flip side is that scientists have shown that most human beings like music, and like talking about it. Finding some favorite songs in common and then moving on is a great way to set up a good vibe for the interview, or, as the kids wearing the bowties say, "establish rapport."