The Hotlist is a geo-social aggregator that finds what's going on around you without you having to do anything at all.
From the press release: "The app aggregates public info from its users Facebook accounts to populate a Google map with events. It then shows them anyone they know who has RSVP'd to a specific event, the guy-to-girl ratio, Yelp reviews of specific locations and any live Tweets to give insight into the pulse of the crowd at a venue or event."
With already 160,000 people on board, and Blackboard and Android users coming soon, The Hotlist is coming together to be the end-all source for what to do on a weekend night. That is, if you like crowds.
All you have to do is get yourself a Facebook account and pick up the app for free. So go on, have some fun!