Lucas stopped Paul after he took a couple of steps toward the training gym. He said, "Master doesn't allow unofficial disciples to enter the training gym, Paul. No one is allowed to break that rule."
The Quinn School of Martial Arts only imparted martial arts techniques to their official disciples and never the unofficial ones.
All official disciples were required to be in the training gym when they were practicing their techniques. The reason why Paul had tried so many times to go there was just so he could take a look at the sect's official disciple-exclusive techniques.
Upon being stopped by Lucas, he laughed and smacked his head lightly. "Oh, would you look at that? The moment I get busy, I just forget all the rules. Alright, I'll just sit outside and have some coffee for a while, then!"
Lucas nodded. The two of them stayed outside and chatted for two hours before Paul finally left with a big smile.