Here's an example of Meetup analytics via Social Report:

Meetup Stats Summary:

Meetup Stats Summary

Activity Timeline:

Activity Timeline

Discussions Activity:

Discussions Activity

Discussions

Event RSVP Timeline:

Event Rsvp Timeline

RSVPs List:

RSVPs List

Reviews Activity:

Reviews Activity

Daily Number Of Uploaded Photos:

Daily Number Of Uploaded Photos

Uploaded Photos:

Uploaded Photos

Group Members By Region:

Group Members By RegionGroup Members By Region Meetup

Country Activity:

Country Activity

Friendship Trend:

Friendship Trend

List of Members:

List of Members

Net New and Lost Friends:

Net New and Lost Friends