What are the essential steps to set up Zwifts virtual events, and are there any specific settings or requirements that need to be adjusted in order to ensure a smooth and enjoyable ride experience for all participants, particularly for those using different Zwift-compatible devices and platforms. Are there any best practices or recommendations for creating and managing virtual events, such as setting up realistic routes, managing group sizes, and mitigating potential technical issues. How do organizers typically handle scenarios like rider dropouts, internet connectivity problems, or uneven skill levels among participants. Are there any tools or features within Zwift that can help streamline the event setup and management process, and what are some common pitfalls or mistakes to avoid when hosting a virtual event.