Our friends at Chicagoist point out that the Billy Goat Tavern, that Chicago institution parodied in Saturday Night Live’s “Olympia Restaurant” sketches in the 70s, is planning on coming to D.C. This news may have many Chicagoans a little miffed, as the Billy Goat is a unique Chicago experiences akin to walking the Magnificent Mile or catching a game at Wrigley. Moving the restaurant to another time zone seems an odd decision for a restaurant…