Those last bouncy notes of Vampire Weekend you heard from the sloshy, muddy lawn at last year's FreeFest at Merriweather Post Pavilion? We hope you relished them, for it might have signaled the last time you'll hear upwards of 20 big bands and electronic acts for free, for some time, at least. A spokeswoman for Virgin Mobile USA today announced that the free festival, which has taken place in the Washington area since 2009, will not return in 2014.