When Briana King started skateboarding in seventh grade, the boys in her L.A. neighborhood wouldn’t let her practice with them until she could do a kick flip, a skill even some of them hadn’t mastered. Five weeks later, she nailed it, but she broke her leg while showing them. “I was like, ‘Damn. It really sucks to be a girl,’” says King, who didn’t step onto a board again until she was 24, after moving to New York in 2017 for her modeling career. “I saw a big crew of girls skateboarding, and I was like, ‘This is what I have been waiting for,’” says King, now 28, who was invited to join them the next day. “Immediately, I had a group of friends that skated—girls and boys and thems.”…