Think nonfiction is a dish best served on celluloid? Then you’ll want to take note of a number of unique opportunities to catch these screenings of new documentary films in the area. Two Good Bets Tonight: The National Geographic Live! film series, in association with the DC Environmental Film Festival, is hosting a special screening of A Life Among Whales, winner of the 2006 Earthwatch Institute Film Award. The film, directed by Bill Haney, chronicles…