Secret #2... 70% of gym members stop going to the gym within 90 days. Gyms prey upon your inability to stay compliant with an exercise program. So they entice you with a free first month or no sales person commission I mean no enrollment fee.
The gym owner knows that within 3 months you will not be stepping foot inside that gym again, but your bank will be having $40 sucked out of it every month for the forseeable future.
If every member of your gym actually went to the gym like they originally planned on doing, that gym would be bursting at the seams. Gyms usually have thousands of members more than can fit inside it.