JW3 is London's Jewish community centre. It manages an incredibly diverse programme. Cinema screenings and comedy shows. Educational courses, kids' activities, and cultural events. With hundreds of monthly events across multiple categories, their "What's On" system risked overwhelming visitors rather than helping them discover relevant activities. As UI Lead, I led the interface design for a complete reimagining of their event discovery experience. The core challenge was creating navigation and filtering that made sense of this density without forcing users to work too hard. We needed a system flexible enough to handle film festivals, yoga classes, lectures, and children's programming. All with different booking requirements and audience needs. I designed a layered information architecture that allowed users to explore broadly or filter precisely. To help visitors navigate the diversity of events, I created a custom icon set that visually categorised each event type. This made browsing and filtering more intuitive, especially on mobile where screen space was limited. The UI prioritised visual hierarchy and progressive disclosure. First-time visitors could orient themselves quickly while regular members could navigate efficiently.