This add alludes to both a stripper pole and being "green." Sex sells, but this draws humor to that. This also relates to the society context of democratic elections, especially now more so, because many woman are very important political figures. "Working the poles" is a pun because it draws upon sexuality of woman and also their ability to work the poles, politically (election polls). "Going green" is also a very contextual thing, because no society places a very high importance on doing things that are environmentally friendly.