In SF Bay area, and a few other cities: https://lu.ma/ https://lu.ma/ and https://partiful.com/ https://partiful.com/ are the most common (for new tech events)

In SF Bay area, and a few other cities: https://lu.ma/ https://lu.ma/ and https://partiful.com/ https://partiful.com/ are the most common (for new tech events) right now. Discovery isn't great, but it's what everyone is using. Luma is rolling out more discovery features, and I search twitter for "lu.ma San Francisco" to find other events sometimes. Nothing that covers the feature set of Meetup though, but much better to use.