One of the more interesting aspects of looking at pictures is in trying to find juxtapositing ideas and ideals in the interpretation.
Sandwich board advertising has been around since the 19th century, but the modern variant is more streamline and techno-chic. Merchants hire packs of sign carriers to work their way through crowds depending on what they are selling. In this case, car loans and a car show.
In this interpretation, the focus is not only on the use of human billboards but also on the physical juxtaposition of the yellow sign and the front of the roadster.