Just to add in a little bit about Japanese college life:
First, in Japan college is generally more laid back than here. The whole thing is that once you get into college, you're set; unless you're at one of the top-rank schools (Tokyo, Waseda, Kyoto, etc.), you have to work at it to flunk out. It's basically the four years in a Japanese person's life where they aren't utterly beholden to some sort of strict set of responsibilities and can therefore unwind a little before entering the soul-crushing workplace.
Second, clubs are a much, much bigger thing there than here. Basically, if it's actually considered a club then you've got club stuff 5-6 days per week. Circles are a little less intensive, but they're still going to be meeting two, maybe three times a week. And figure that pretty much everybody is in one, because there are clubs and circles for virtually everything.
Expect that Ichigo and crew had an interesting time avoiding recruitment by any of the athletic clubs. I can actually see him wandering into a circle focused on supernatural stuff occasionally just to be amused by what they think is going on.
And Orihime probably tried to join some sort of cooking circle. The end results would make an amusing story in their own right.
Frats as we know them, however, don't exist. Nor do dorms. The social role of the former is taken by club/circle life, and the latter just isn't there for some reason. About the only exception is foreign students; there usually are dorms of some sort at the places that regularly have exchange students coming in.
I also have this amusing mental image of Ishida being dragooned by the local Genshiken-esque club to a) make costumes and B) convince Orihime to wear the ones that don't work with normal Japanese female proportions.
Also, what are the chances that Ichigo minors in Spanish? If nothing else, as part of a quest to try and figure out why everything Hollow-related seems to be in that language?