How come the majority of sports bars have the Dallas Cowboys on the biggest screen?

I live in Atlanta and it just hit me that whenever I go to a bar, there are lots of tv's but they have the cowboys on the biggest screen with the volume drowning out the other games. Sometimes the bar is so packed, that the next one I go to, they also have the cowboys on the biggest screen. Out of about 20 times I go to a bar on sunday 15 times the cowboys are on the big screen. Why is that and does anyone notice that when you go to bars?