People who are at the end of the rows, especially those who are seated closest to the front, are usually singled out and instructed to be the leaders for their sections of the audience. They get encouraged to scream louder and dance harder than everyone around them. No, you can not request this position. These individuals are preselected at the beginning of the show, and there is absolutely nothing you can do about it.
Moving Those Legs
For some reason, dancing is one of the primary attractions for members of the Ellen audience.