When I went to a small LAC back in the dark ages, if a class was not going to be offered one year or semester, I’d just go to the professors office and ask to be allowed to take the class early. Took senior seminars as a sophomore and classes out of sequence (eg even advanced classes before completing all the official pre-reqs.) The advantage of a small LAC is that many of the professors knew you (especially in your major) and would routinely let you take what you wanted. I never had a problem getting into a class I wanted, and was never shut out at registration. In contrast, that is a frequent complaint I hear from students today, especially if they do not have preferential registration. And then they have trouble with the sequence of their required classes for their major and the rest of their schedule. It was a pleasure to pass a professor in the hall, say “I’d like to take your advanced class in xxxxx” and they’d say “sure. Stop by my office and I’ll sign your registration form so you can register for it”. Yes, this was in the days before on-line registration, but it would be surprising if this kind of exception wasn’t still relatively easy to get, assuming there is room in the class. Actually, many of the profs at my LAC simply made room, even if it was a small colloquium .