As you know, there are many types of student organizations. Besides the opportunity for leadership experience and conferences that others mention, they provide opportunities to learn about clinical practice, business, and networking when the club invites guest speakers. They provide opportunities to do certain activities that you may not normally be exposed to early on (advanced suturing in surgery club, skin biopsies in derm club, breast and pelvic exams in OB/GYN club, more OMM experiences in SAAO, etc). You get the opportunity for more volunteer experiences, health screening responsibilities, and so on. Our school even has a musical group who performs multiple times each year. Plus, many clubs provide meals to members at their meetings. As your schedule allows, find a couple or few things you are interested in and get involved as a way to enhance your medical education experience.