It's the annual Drupal Global Sprint Weekend, happening all over the world on the last weekend in January, the 30th and 31st.
Here's how it's going down in Austin, Texas:
On Saturday it will be happening from 9-5 at Tech Ranch, 8920 Business Park Drive #250, Austin, TX.
On Sunday the event will start at 9 a.m. at ATX Hackerspace, 9701 Dessau Road, Building 3, Suite 304, Austin TX 78754.
Check out the event site for more details: