My stomach turns just thinking about no-shows. If you do this, you are immediately labeled the worst kind of person and your Chapter Leader will probably hate you.

If your plans change and you can't make it anymore, take the 30 seconds it requires to come back to the event page and click the giant red button to UNREGISTER from the event. Your Chapter Leader will get an email you pulled out and will appreciate your non-no-showiness.

How to unregister should be pretty obvious...