The Chicago Bears Don't Have Cheerleaders

According to Wikipedia, the other teams include: the Cleveland Browns, New York Giants, Detroit Lions, Green Bay Packers, and the Pittsburgh Steelers. The February 2011 meeting of the Packers and Steelers at Super Bowl XLV was the first time a Super Bowl featured no cheerleaders. The Packers do however use a collegiate squad from time to time in a limited role to cheer at home games.

The other 26 teams (out of 32) all have cheerleaders.   You can see the full list here.