Rumor has it that Patriots quarterback Tom Brady had money on Orb at the Kentucky Derby over the weekend. Based on the way he celebrated the horse’s win, we believe it. Video was taken of a bow-tie-wearing Brady jumping up and down in Louisville with former Pats teammates Dan Koppen, Tedy Bruschi, and Wes Welker after Orb took the Derby prize. Brady was also spotted at the Barnstable-Brown Kentucky Derby party on Friday night. . . . Local Derby parties included a soiree at the Back Bay Social Club hosted by Boston’s own University of Kentucky Alumni Club. Revelers at that affair included locals Lauren Rowe and Drew Feldman, and Kirsten Harkleroad of Savannah, Ga. . . . While Brady was at the Derby, his wife, Gisele Bundchen, was in New York for the opening of the new Dolce & Gabbana Boutique on 5th Avenue. The party also drew “Game of Thrones” actress Emilia Clarke, Chloe Sevigny, and Kylie Minogue.