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.
On the left is Anthony who was one of the key players on the hospital side who helped organize it. He was not in the group picture as he was taking the photo. His coworker Jackie who is in the group photo was equally important.
Natalie also didn't make it into the group photo. She was one of the people from the Fragforce side who flew in to help with the event.
Many others, such as Ben, Ana, and Chandni, weren't included as they weren't around for the photo but were equally important.
More information on the event can be found on Fragforce.com and the event page.