Student-run Health Clinics for the underserved are a popular way of gaining clinical experiences.  Many large undergraduate universities will often have these organizations that serve the need of an underserved population as well as give the participants hands on clinical experiences for pre-health applicants.  Typically, these Clinics have one or several physicians volunteer at the clinic and see patients free of charge. Volunteers for these Clinics help with the patient intake by recording vitals (blood pressure, heart rate, weight) and take a brief patient history.  Other tasks involve doing back end clerical work organizing patient records and their visits.  Some more well established clinics will also have a "pharmacy" that distributes medication to patients who cannot afford them.  This is a great opportunity for future pharmacists. 

Why are these clinics valuable for your application?  First, they provide you hands on experiences with taking patient histories. Secondly, you can get a good letter of recommendation from a volunteer physician who you actually work side to side with.  Most importantly, the organization is student run, so that means there will be leadership opportunities available to you.  Volunteer to be a shift leader or to be one of the officers that helps with contacting drug companies for donations or recruits new physicians to volunteer for the organization.  One of the qualities that medical schools are looking for in potential medical students is leadership!  Demonstrate your leadership experience by volunteering.