Hardbody.com posted a photo of an advertisement for a health club chain in the Virginia/DC area called Fitness First.
Check it out... There's a scale in the bus stop bench, showing everyone what the seated person weighs..Now if that isn't motivation to get up off your butt and do something, I don't know what is.
Not sure how long the bus stop will stay up before someone sues for defamation of character or some bull$hit reason, but I think it's a pretty good advertisement from Fitness First.
Gets the point across.