Is the University of Arizona a party school?

I applied as an Astronomy major because I was under the impression that it was one of the top schools in the nation for Undergrad/Grad Astronomy studies. However, now I am hearing that U of A is a party school, and I'm a little wary that I will be surrounded by parties and drinking nonstop. I want a good educational environment, not nonsense. Although I'm not looking for a complete sober school, I don't want to be looked down upon by professionals and graduate school administration when they learn that I studied at UA.