Events - Who's attending.

I have a node type: Events, which uses the events module to display a concert calendar.

What I need is some solution where my users can click a link saying "I'm going to this concert", and then that adds to a view that shows all of the upcoming concerts that user is attending, as well as a view for the individual concert that shows each user who's attending.

I've tried the signups and the favorite node module to little success. Any ideas?