It varies. In burgerland, I think at the very least students are likely to meet or have at least one marxist professor - likely the first marxist in a professional position they have ever met.
I had one outwardly marxist professor who taught us the propaganda theory of media criticism. This is a very useful thing to know as a communist in burgerland.
That prof aside, college liberalised me. I came out more pro-globalization and pro-capitalism than when I entered. It took me some time to shed the libness and return to leftism.
I think college on the whole these days is more likely to make people libs than anything else. The only reason conservatives whine about colleges being Marxist brainwashing sites is because statistically college educated people are more likely to vote Democrat, and they couldn't recognize a real communist even if they were run over by a tank.