[akvadrako]

Of course there is Meetup which is certainly large enough for everything except the most niche event.

[orarbel1]

Meetup is one of the spamiest products ever

[mevile]

Never seen spam in Meetup. I hooked up my personal calendar with Meetup and it added quite a bit of events into my calendar which was a bit spammy but it's only because I had told Meetup I was interested in all that stuff and it was easy to shut off and filter out.

WeWork bought Meetup recently so I don't know if any of that will change now.

[ValentineC]

It isn't free to set up a meetup on Meetup.com though (which arguably helps keep the spam away).