Since 1993, MAGNET has been covering independent rock music with a scenester’s passion that’s second to none. As a longtime contributor to the Philadelphia-based magazine, I’m a little biased. But for those of us who hung in there through its brush with mortality a few years back, the celebration is that much sweeter. And with MAGNET fave Guided by Voices headlining, there should be plenty of alcohol-induced euphoria to go around. It is a 21st birthday party, after all. Visit www.thetroc.com.