Running A Basic ____ Meetup
Running an amazing meetup is a bit of an art, and you can make many changes to the basic format. But running a basic meetup is mostly a matter of doing straightforward steps in order and not forgetting anything big. You might make some choices differently depending on what the meetup is about (bring chess sets for chess club, have safety equipment for a martial arts dojo) but the outline is remarkably similar for many kinds of events. The main changes are in scope and scale.
This sequence is for running a basic meetup, for several broad kinds of events.