The 2600 magazine started in the 80s as a hacker magazine, where all the people who wanted to participate could do so with papers, research, and publications. It is not only a written resource for learning, but it is also a remnant of the old hacker community. The magazine started to publish groups sponsored by the 2600 magazine, with meetings focused on discussing the papers and vulnerabilities published in the magazine. Nowadays, many of them have disappeared, but there are still some very active groups. You can find the meetings at this link: https://www.2600.com/meetings/.