We've the newsgroups in news.tilde.club that work same.
I think that the newsgroups are more confortables to read
The unsubscribe info is in the headers; if your client doesn't surface those (one disappointment in Fastmail's web interface: it doesn't) then you can still manually send mail to the unsub address:
tildeclub-leave@lists.tildeverse.org
Is it redundant for club to have both the mailing list and the newsgroups though? Or rather, what things make it useful to have the two systems?
~cosa