This is a group photo from the 2016-11-11 to 2016-11-12 Fragforce event at the UCSF Benioff Children's Hospital in San Francisco. The picture features most people who helped make the event happen. Without the people featured and several others that weren't available for the phone (or were taking the photo), the event never would have happened.
Fragforce has an event coming up on the 4th (SFDC employees only) and the 5th (everyone). It's basically a big LAN party with board games too.