I have friends in all three institutes and therefore am the best person to answer this question. From what I heard from them MIT seems to have the best crowd and the following points will help you understand this better
So if you want to make some crazy friends and enjoy your college life to the fullest, MIT is the best choice for you.
I know about the campus life at MIT as my sister goes there. The following points are based on her experience at the campus:
You will definitely have an exciting college life on the campus of MIT in both academic and non-academic terms.