This past Tuesday, I came upon a number of house sparrows queuing up in NYC's Central Park, which showed what true New Yorkers they can be. After all, New Yorkers stand on line (as opposed to in line) for almost anything, and by most grammarian's standards, to say one is standing on line is legit. According to the Grammarphobia Blog, "standing on line" is "an accepted idiom in New York City to stand 'on line,' though it sounds odd to people from other parts of the country."
Grammarphobia explains that "somebody from Atlanta or Chicago or Omaha or Phoenix gets 'in line' and then stands 'in line'; somebody from New York gets 'on line' and then stands 'on line.' (Same idiom whether you’re getting in/on line or standing in/on it.) Similarly, New York shopkeepers and such will always say 'next on line!' instead of 'next in line!'"
They also state that "New Yorkers aren’t the only folks to stand on line. The Dialect Survey which maps North American speech patterns, found that the idiom was most prevalent in the New York metropolitan area, but that it occurred in pockets around the country, especially in the East."