Are you using "Meetups" to mean Meetup.com or just events in general? Meetup.com has completely gone to shit. Trying to find an event is super frustrating. They show the same events over and over. They don't enforce categorization. People mark online only events as in person and the platform doesn't care. They also started trying to charge users (people looking to attend events) instead of only planners (people hosting events) so it drives people away.

Sadly I don't know any better platform but it seems ripe for a new entry.