How do meet up groups work?

Meetup is a website that allows users to organize get-togethers with others who enjoy the same activities. Some common examples include sports teams, book clubs, and social groups. By signing up, you can find a group that suits the activity youre looking for, or create your own group to bring others to you.

Where would you like to meet up meaning?

: to come together with (someone) : to go to a place to be with (someone) Ill meet up with you later.