How do I start or join a local Indie Hackers meet-up?

This question is about connecting with other entrepreneurs, makers, and founders from the Indie Hackers community in real life. Many members want to meet people in their city or region to share experiences, exchange ideas, and build accountability. Some users are asking how to find existing meet-ups (whether through the Indie Hackers website, forums, or community boards), while others want to know the steps to start their own meet-up—such as creating an event page, promoting it to local members, choosing a venue, and keeping the group active. Essentially, the question is about how to move beyond online discussions and build offline, real-world relationships within the Indie Hackers network.