Remember last week when we told you to mark your calendar for this evening? Force yourself away from the One Tree Hill season premiere and head down to the Corcoran Hammer Auditorium for Night 1 of the second Experimental Media Series. Presented by the Washington Project for the ArtsCorcoran, tonight promises Cowboys, Clichés, Codes, and Conspiracies. In this show curated by Peggy Parsons, the Head of the Department of Film at the National Gallery of…