Saturday & Sunday, September 17-18th.
Hacking starts at 10 am Saturday, powers on through the night, and finishes Sunday late afternoon.
Foursquare SF. 363 Clementina St, 2nd floor. https://foursquare.com/venue/22891301
Remember: attendance is not guaranteed unless you receive a confirmation from us! And if we can't fit you in, don't forget that we still love you and you can always join one of the community hackathons happening in the area: http://www.meetup.com/foursquare-API/