Way back in the 1990's, between undergrad and graduate school, I took introductory statistics, linear algebra, and 3 advanced calculus classes at night at a local CC which had ~4 different campuses in the metro area. It was mostly college or grad level students taking the courses for credit. Most of the professors had a separate, professional day job. Two were heads of their respective departments at the school.

Based on my experience I would say that community colleges are great for learning the material, and universities are great for socializing and learning stuff outside of the classroom through self-directed interests (especially in graduate school).