Expandable structure and vendor space

An expandable vendor structure, comprising:

• a front structural unit and a rear structural unit, wherein the front and rear structural units have inside-facing surfaces parallel to one another,
• a retractable top that spans the front and rear structural units and is connected to front and rear structural units, wherein the retractable top is a rollable screen fixed to the tops of the front and rear structural units,
• first and second retractable partitions, each of which spans and connects the front and rear structural units,
• wherein the front structural unit is immobilized by fixation to a substrate and the rear structural unit is mounted on a rolling mechanism so that the rear structural unit moves away from the front structural unit in an orientation perpendicular to the face of the first structural unit to a distance equivalent to a deployed depth of the first retractable partition, the second retractable partition and the retractable top,
• an exposed shelf surface pivotally or hingeably attached to an outside-facing surface of the front structural unit.