2. Fitness Classes: Although these college classes are not so much for credits or learning. This is one of the most effective ways to socialize with people in college. These classes would be very useful to audit once you are fresh out of college, or someone that is college age who hasn’t gone to college and are just beginning to expand their horizons. Learning a skill like dance, yoga, or any other school based fitness class could tremendously improve ones quality of life, or social confidence after being mentally and physically stimulated in this sort of environment.