Contractors got their groove on at Gorham’s, performing their version of the Harlem Shake dance craze.More than 250 contractors attended Friday’s “Contractors Night” appreciation event at the home and buildings supplies store, and the spontaneous dance proved to be a big hit.“The Harlem Shake went off perfect,” said Gorham’s director Rod Farrington said.The evening event featured a Wheel of Fortune prize game plus Crown and Anchor with play money or ‘Gus Bucks’, named after Gus the company mascot. A number of vendors also displayed new products lines at Gorhams, including a new window line.On Saturday, it was the general public’s turn, as Gorham’s held its annual Home Fair.