Utilizing the STOKE Sustainability Management System template, the Surf Clube de Viana and event organizers were able to create their sustainability plan, set targets, and orient volunteers efficiently. In order to gauge how effective their initiatives and education were, the surf club partnered with a team of researchers at the local university—Management and Leisure School of Viana’s Polytechnic Institute—who surveyed all attendees at the end of the event to measure their understanding of the EASC’s sustainability projects and their overall satisfaction with the event to verify the accuracy of claims and promotional materials. This helps mitigate greenwashing and guide organizers to make adjustments for the next event.