This coming Sunday, The Black Angels and The Black Keys are both performing at the 9:30 club in D.C. The Black Angels go on at 8:45pm E.T. followed by the Black Keys. For those of you not in town or who are here but simply don't want to brave traffic in the city, NPR is webcasting the live concerts and as usual, fans can chat to All Songs Considered intern Vicky Markovitz here. The link to the online chat will appear during the start of the concert.