This question really deserves an elaborate answer. Not sure if it has one though.

The whole idea behind a meetup is to connect people with a similar interest or a similar group of interest so that they can talk, listen to and discuss things that they care about.

HN has such broad range of topics that it is seems hard to find a group of people sharing the same interest.

It would be really helpful if somebody that attends these meetups shares insights about them.