It is kind of interesting. At my college, we had large batches of students from (Mexican) migrant workers in our dorms. With very few exceptions the majority of two person dorms were 1:1 matching one of them with a second generation (and onwards) citizen. I thought it was a great way to expose all of us to both integration and diversity. It wasn't smooth for everyone of course, yet I thought it was a good balance of culturally jarring experiences, while still providing close proximity to people from the same background (e.g. several migrant worker kids in same hall still). I haven't really thought much about that since College but kind of assumed most places did something similar. (We also had specific classes that highlighted migrant worker issues / history).