There are rules at the gym , but you wouldn't know it by the way these people tried to work out. Let me tell you a story. The year was 2011, and a brand new Planet Fitness opened up in my area. It was so cheap back then that even as high schoolers, my friends and I could pay monthly to go work out . Gym class? Nah, we couldn't be bothered. We felt like we were adults, and we wanted to work out like them. It didn't matter that we didn't know how to use any of the machines; we'll figure it out as…