आप go to Fanpop's घर page. Then आप click on the category that the club is in (device sideways: go to the bar at the चोटी, शीर्ष above all of the featured content. Device vertical: scroll all the way down to "browse clubs") and find the club. And then आप click the red x that says "leave".
Go to your प्रोफ़ाइल and go to the section क्लब्स (fourth grey button beneath the banner). Find the club आप want to leave. Hover on the top-right corner of the club's box and a पार करना, क्रॉस will appear. Click on that cross.