Click on your name in the top right corner of the screen. Under the “Involvement” option from the drop-down menu, you can access all of your personal interactions on campus. You can access the "Memberships" tab to see all the current and past organizations that you belong to listed. Expand an organization, and a button is provided to you to “Leave Organization”, which will terminate your membership to that particular organization.
Click on "Leave Organization" and confirm that you want to end your current membership with that organization.