DowncityJS is a 24-hour JavaScript Hackathon taking place in Providence, RI on February 2nd.
 
The rules are simple: show up with your laptop, design or development skills, and assemble a team of likeminded hackers (or participate by yourself if you are brave enough) ready to build the best web application of JavaScript library in 24 hours.
 
Food and beverages will be provided by the Founders League and space and connectivity will be provided by Betaspring.

95 Chestnut Street, 3rd Floor, Providence, RI 02903

Check out http://downcityjs.com/ for more info.