I'm building it because it is a problem I've faced among my friends and well.. the "millennial" generation to begin with. I'm building it first to be used among myself and friends.
I don't want to say too much because to me the solution seems so obvious and I'd like to have something out there and tried on a small scale first, but... the key is not to focus on events directly, but people.
If anyone would like to know more, my twitter is on my profile, DM me there!
Right now it is just me. I'm also currently torn on focusing on the consumer social space (not social network) or the business space. Both seem pretty promising targets but vastly different approaches to marketing.