Can anybody join any extracurricular activity or do I have to be accepted?
In some cases, certain skills will be a prerequisite for participating in a specific extracurricular activity - for instance, playing with an orchestra or band. This is also true of varsity teams for which students must try out and be accepted. Sororities and fraternities usually have procedures through which members must be accepted, and there may be other examples along this line, depending on the school.
Most extracurricular activities, however, are open to anyone who is interested. Find out what is offered at the schools you are considering. The extracurricular activities with which you become involved will do much to increase your enjoyment of your college experience.
Many schools offer students the opportunity to create new extracurricular organizations if something in which they are interested does not already exist on campus. In order to start a new organization, a student is usually required to present a petition with a certain number of signatures of other interested students. This required number is typically quite low.