Before- The guest bedroom had purple walls and bunk beds wedged into the 7 x 9' space. My favorite part (which is not obvious in the picture) is that their are plastic vertical blinds covering the electrical box in the corner...classy!
After- We built a proper surround for the electrical box and basically replaced or painted every surface (walls, trim, doors, carpet, etc.) in the room. It's still small but a practical space for guests.