It was a calm night with D.C. thankful for being spared the full force of Hurricane Sandy. Accompanied by their parents, adorable little trick-or-treaters dominated the residential streets, east side and west side, in the early evening hours. Then, it was time for the adult parties and the increasingly crowded scene radiating from the intersection of Wisconsin Avenue and M Street. Officers from the Metropolitan Police Department were out in force with cruisers, a mobile commander center parked next to Serendipity 3 and officers on horseback. Halloween celebrants walked along the sidewalks, happily meeting and taking photos of any interesting ghoul, monster or fake celebrity. Except for a small Occupy D.C. protest in front of Councilman Jack Evans’s house on P Street around 10 p.m., no other incidents were reported.