A job opening posted on both JournalismJobs.com and Media Bistro, a “Washington, D.C.-based publishing company” is looking for freelance gossip columnists who can”do for the nation’s capital what the New York Post’s ”Page Six” and Lloyd Grove, Joanna Molloy and George Rush of the New York Daily News do for the Big Apple: Publish insider gossip that no one can afford to miss! Are you plugged in to the D.C. social and political scene? Do…