Any trainer in a ‘big box’ gym eg. Fitness first, Goodlife, Genesis can implement there own version of these easily and become the fastest at generating leads within the gym. As you’ve noticed you cannot reply on management, you need to become ‘self generating’ to survive.
I’ve used these techniques time and time again, with myself and for my trainers.
Love what you do and it becomes easy.
Let me know how you go.