Come September 1, the city's new smoking ordinance goes into effect, banning smoke in just about every building imaginable. One of the few exemptions will be cigar bars, thanks pretty much to Downing Street Pub. What saved Downing Street? Was it the 400-square-foot humidor in the center of the dark bar, stuffed with high-end cigars and Dunhill cigarettes? The single-malt Scotch, the comfy couches and clubby atmosphere? Or maybe the Whitehall pub sandwiches and the free wi-fi? Nah, it likely was all the city council members, lobbyists and hotshot attorneys who hang there.