STEM clubs, often located in extracurricular settings, are designed to promote engagement and enjoyment of STEM-related topics and concepts. Given the current policy landscape, a closer examination of STEM clubs is warranted. This paper explores the opportunities and challenges presented by these programs by drawing on interviews with nine STEM club providers in Queensland, a state in north-eastern Australia. The study aims to elucidate the key elements perceived to contribute to the effectiveness and success of STEM clubs, whether school-based, library-based, or run by private businesses for profit. Through inductive thematic analysis, three prominent themes emerged: visioning, pedagogical design and intent, and facilitation. The analysis reveals that Queensland's STEM club context presents significant opportunities for authentic STEM learning and teaching, however, it also identifies challenges to be addressed, including recruiting facilitators who possess expertise in STEM knowledge and skills, possess the necessary confidence and ability to design and implement STEM activities, while also being able to engage and connect with student participants effectively. The findings have implications for STEM-related activities in other informal learning environments.