Meet-up organizers – What makes a good meet-up?

Hey WP meet-up community, my name is Evan I’m in British Columbia, Canada and I was just curious to find out what some of the most common challenges or issues are with organizing meet-ups in your area.
My company (Timely) is the maker of the All-in-one event calendar plugin and we’re interested in using it to help develop a global meet-up calendar network. Anyone using the plugin could feed their events to a general WP meet-up calendar and users could then search by area or tags. But I wanted to poll the audience first and see if there would be any interest or need for something like this.

Any input would be much appreciated.
Long live WordPress!