They are several artists named "Walk the Moon";
These are photos from concerts where Walk the Moon played, so they may be of other bands that played the concert as well.
Holychild
Saint Motel / Walk the Moon / Holychild Oct 29, 2015 Los Angeles, California, United States Uploaded by Wicked Goddess Credit: © Kathy Flynn/Wicked Goddess Photography
Saint Motel
Walk the Moon
Passion Pit / The Roots / Walk the Moon / St. Lucia / BORNS Oct 24, 2015 North Charleston, South Carolina, United States Uploaded by Christophermarco
Daytime Village at the iHeartRadio Music Festival 2015 Sep 19, 2015 Las Vegas, Nevada, United States Uploaded by Lifeonthescene
Hippo Campus / Atlas Genius / X Ambassadors / Walk the Moon Aug 22, 2015 Minneapolis, Minnesota, United States Uploaded by Chiara Storm Caldwell