Georgetown is a very cosmopolitan place, with students representing more than 100 countries and all 50 states of the union. So if you are aiming to meet a variety of people in college, Georgetown will definitely provide a nice avenue through which this can be done. The only issue is that although these people will be from a variety of geographic locations, they will, for the most part, represent a similar, middle- to upper-class, socioeconomic status. On top of that, there is a definite preponderance of Jersey/New York/California white kids from private Jesuit high schools. Georgetown has diversity for those looking, but as the adage goes, "You can lead a horse to water, but you can't make it drink"—so some students choose not to find that on campus.
One facet of Georgetown's diversity that is particularly unique is not the number of international students—as those students tend to segregate themselves among their own at most universities—but the number of internationally-minded people. Most of these students were born and raised in America, but their parents were not. This gives them awareness of the world and cultures outside of "the norm." Any number of languages can be heard while you walk through the halls, and nearly every student has been out of the country multiple times. To top it off, there are a number of fascinating "outliers" who you meet fairly frequently, from the granddaughter of the first Latvian president to the daughter of the last Shah.