What are the most effective ways to create a more immersive Zwift group ride experience by customizing the in-game environment, and how do different approaches impact the overall dynamics and camaraderie among riders? Are there specific route selection strategies, custom event creation techniques, or in-game settings tweaks that can significantly enhance the sense of community and shared experience during group rides, particularly for larger or more diverse groups? How can ride leaders balance the need for a consistent and engaging experience with the desire for flexibility and adaptability in response to changing group dynamics or technical issues? What role do Zwifts built-in features, such as meetups and events, play in facilitating customized group rides, and are there opportunities for creative use of these tools to create more bespoke experiences? In what ways can riders use external tools or integrations, such as Discord or Strava, to further enhance and customize their Zwift group ride experience, and what are the potential benefits and drawbacks of these approaches?