Allow us to invite members based on their interest filters.
I'd like to be able to create meetups and only invite people who have checked "activism" as an interest. My meetup has two kinds of people, primarily. People who want to learn more about an issue to determine whether they want to make changes in their life, and people who are already convinced that this issue is important and they want to do more. I'd like to invite people who are looking for ways to make a difference without freaking out the people who aren't sure about how they feel yet.