The Meetup Node.js SDK by Meetup and collaborator Juan Pablo Kutianski allows to access community features that aim to extend invitations in social media applications. Examples available on GitHub present events, RSVP, groups, and photos. Additional samples at https://github.com/jkutianski/meetup-api/tree/master/examples
According to a post from a Google engineer, intended to be private to the search giant's employees, the Google+ API was not ready at launch. Google's Steve Yegge also badmouthed the read-only, public API. When the company's new service was only two weeks old, I wondered whether the Google+ API was intentionally late. Maybe it was just truly late.