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Gym looks like a therapist clinic, most likely to be a final gym.
As soon as you enter the gym, a nurse will ask some questions to analyze your general mindset as a player.
These questions determine the difficulty of the trainers as you go through the gym. Answers that imply competitiveness gives the trainers and leader stronger AI, answers that imply being more casual makes it weaker.
Most of the trainers are female, and dialogue pretty much show they're in trance.
Leader himself acts like a shady doctor, and tries to analyze the player himself based on their answers. He then pretty much shows a mild desire to mess with the player's mind himself.