We always tell you where the free concerts are, but just because a concert is free does not mean that it will be good. This week, we are leading with the free concerts because they are so good. Other than the free stuff, there is so much to hear, we have selected a few options from what is less expensive, not sold out, and likely to be good. FREE, FREE, FREE: >> The Washington Bach…

(Classical music agenda by DCist contributor Charles T. Downey of Ionarts) Having done this agenda a couple times as a bimonthly column, we feel like we don’t talk to you people regularly enough. Some readers have wondered why DCist is covering classical music, but we also know that other readers have gone to concerts suggested here and rediscovered a latent interest in things classical. Therefore, we resolve to give you a look at the concerts…