How do I choose a pre-health/pre-med organization to join in college?

My college offers several organizations and I'm hoping to join at least one, but I'm not sure how to choose since they're all different; some are larger groups than others, or for a more specific population. I'm looking at: Alpha Epsilon Delta Pre-Health Honors Society Alpha Delta Minority Pre-Health Organization Minority Association of Pre-Medical Students Medically Dedicated Student Organization (Pre-health) I'm trying to attend the first meeting of each organization, but I'm not sure... How do I choose a pre-health/pre-med organization to join in college?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums