relationships between houses

I am thinking about going greek this year but I have a lot of close friends all in different frats/sororities. And I was wondering, do all houses get along?? Or are there certain houses that don't like each other. All my friends are PC'14 so they don't really know the ins and outs yet, they seem to have fun but I just don't want to go greek if it ends up being unnecessary drama between houses and stuff