Don't worry, I'm not just photographing tons of kids running around (although I did just photograph a cute one at the beach last weekend). This one was of a private event hosted at the DC Historical Society. Partially de-fished from a 15mm canon fisheye. One off-camera flash in the very back; one "stage" right pointed in, and one on-camera lighting source.
Also featured here:
http://dcist.com/2011/04/saturday_heres_to_trash_pickup_phot.php