My answer that I gave earlier was assuming that you were not an employee or a private contractor hired by the gym you’re at. But if you are, then don’t listen to me! I have no idea what the typical split is for employees or PC’s. Where I live, many gyms allow trainers to use their facilities for negotiated fees, basically just to get new members. Some gyms simply charge a flat monthly fee to outside trainers, regardless of the number of clients they train. Whatever your situation is, negotiate the best deal you can.