GET A MOVE ON: Berlin Fashion Week visitors to local designer Esther Perbandt’s off-site presentation Saturday were enjoying ice cream and pink champagne on the sidewalk, and wondering where the clothes were. Suddenly they heard strains of something festive. Big white balloons bearing the Esther Perbandt label bobbed into view, along with a parade of models boogieing in her Spring/Summer collection, titled “Instrumental” and accompanied by the all-girl brass quintet Venusbrass. Perbandt joined her models in getting down to a street-side drum solo. The collection, in black, ivory and red, will also be green: Half of it is sustainable, using natural and locally sourced materials.