>> The Corcoran is all abuzz these days with their newly-announced director and blockbuster shows featuring Andy Warhol and D.C.’s beloved Sam Gilliam. A new exhibition opens there on Saturday that focuses on the depiction of banjos in paintings, drawings and photographs, including the ca. 1895 photo of the woman at right. Interestingly, the exhibit is partially funded by the Steve Martin Charitable Foundation, according to the museum’s website. (Who knew that Steve Martin was…