My experience with diversity on campus has been very pleasant. There are plenty of groups for all kinds of students. There are often "programs" throughout campus that are put on the raise awareness for different situations. I have attended many programs about race, gender, economic statuses, etc. Additionally, most of the teachers I have had have been zero tolerance on negative word choices. Personally, I am an advocate for Spread the Word to End the Word (check it out!).
I can truly and honestly say that I do not think anyone would feel out of place at this school as long as they are willing to take a few steps outside their comfort zone to find others with similar interests, ambitions, or desires. I repeat, you MUST be willing to at least make an effort. I can't guarantee someone would just walk up to you because you look like someone they want to get to know (but it has happened on occasion).
What you wear to class depends on your major, really. Some majors require you to dress up for more presentations than others. On the regular, though, you can find me in leggings or yoga pants and boots. No doubt that we are a leggings and sweat pants campus (and there's no shame in that). Anything beyond getting out of bed and going to class seems to be extraordinary in college anyway.
Absolutely different types of students interact. But as anyone with a sense of interpersonal relations would know, you have to be open and willing to break some barriers. People typically stay with what's comfortable. At a bigger school you have to be able to make the uncomfortable comfortable sometimes.
If there were only four tables in any one of the lunchrooms, it would be very hard to describe who's sitting where. Unless someone is wearing something that distinguishes them as some type of label, I would not even give a second glance. We have multiple "restaurants" on campus as well as fast food options, a mini grocery market, and a dine-in buffet option. Who you see depends on where you go.
As stated before, something like 70{4a082faed443b016e84c6ea63012b481c58f64867aa2dc62fff66e22ad7dff6c} of the student popluation is from the Louisville/Jefferson area. I have come in contact with all socio-economic statuses. From the individual who has a Range Rover to someone getting by on government grants and a few credits at a time. No one really boasts one way or another of their financial background, so unless someone offers up their experience in a class or happens to confide in you, you often do not know.
There are political activists as well as religious activists on campus, but unless you want to pay attention to them, it does not really affect the day-to-day.