UCLA has that cool thing where they invite cool people to their big hall. Claremont Mckenna does something similar.
UC Berkeley does the same thing but much more low key. There’s one unit seminars in most majors where cool people from a specific field come in to talk every week. There’s one for Integrative Biology and one for Politics at least. Then there’s also smaller lecture series which are posted on boards everywhere or you find out about if you are on a random emailing list. Like, the Entomology club has a brunch and lecture every Friday at 10am with some really specific bug research lectures. If you go looking, there are a whole lot of cool people coming on campus, not just the big comedians, Cuco, No Vacation, or far right commentators, which we also get.
The people at Berkeley are like all of the smartest people in your high school class in one school. Berkeley classes are honor/AP classes. It’s not that everyone’s a genius. It’s not as hard core as you might expect, but it is difficult and requires some effort.