We're a small group 5-10 people, so it's very informal and friendly. I'm sure Fabio (https://fabionatali.com/) who organised it would have good advice! I'll say that from my perspective the fact that it's also virtual is really great as otherwise I couldn't attend!
I sometimes think about setting something up in my new city.
Do you have any advice for getting a meetup off the ground? I guess meetup is still the best thing to use (it was what my old C++ user group used).