UCLA is a public school in every sense of the word; we represent the public quite well. There are some interesting racial and gender breakdowns between majors; for instance, there are more Asian students in south campus majors than in north campus, and more women in the humanities classes than men, etc. In my experience, students develop different circles of friends based more on shared experiences than upon demographic—you’ve got friends from your dorm, friends from your classes, and friends from your clubs. These circles are usually as diverse as the places you form them.
UCLA has its artery—Bruin Walk, the main walkway between the dorms/off-campus apartments and the classrooms and lecture halls. Naturally, clubs use this to advertise themselves, meaning that in a five-minute stretch you can (and will) come into contact with activist groups for either side of the political spectrum, Greek representatives, job recruiters, religious/antireligious debaters, and literally everything else you could imagine. Sometimes it’s a pain, because often these groups are ones I would never be interested in, but if there’s a group you want to find and join, then they’re more than likely out there. All in all, most of the groups on campus feel really comfortable getting themselves out there because it’s such a diverse (and overall tolerant) campus. You’ll hear too many rather than too few opinions, which I think stimulates a pretty healthy environment for debate and learning things outside the classroom. Basically you can be as involved or uninvolved as you like, as always, but open-mindedness really is the key in such a place as UCLA, where there are plenty of people with opinions so strong that they have no qualms about questioning yours. Overall, the only discrimination I see is against ignorance. There’s enough diversity and large enough numbers here that there’s no real minority except in the numeric sense—even a “minority” group has a voice and an opportunity to use it, often very publicly on Bruin Walk.
Most UCLA students are from California, and specifically the Southern California LA/Orange County area. But luckily the fact that we’re a public school eliminates a lot of ethnic or socioeconomic exclusivity; you’ll see a lot of very wealthy students, but you’ll also see just as many on a financial need scholarship, and because we’re not a private school, those demographic separations aren’t often the topic of conversation. Ethnically, you might see some cohesion, because we’re in LA, and that means that if you’re Persian or Korean, there are plenty of stores, restaurants, religious centers, etc, that cater to these cultural traditions and therefore attract specific audiences, making it easy to spend time with people of similar backgrounds. But, conversely, because we’re in a city that can support that kind of diversity, it’s just as easy and acceptable to overlap as it is to separate.
Politically speaking, we’re California, and it’s a university, so it should be no real surprise that we’re fairly left-of-center. But Bruin Republicans are still a pretty strong and respected presence on campus, and while they may not have the number of Bruin Democrats, it seems to me that they make up for a lot of that difference in strength of participation. Essentially, the only significant singling-out you’d face as a political minority is a heightened opportunity to debate your opinions.