Do NOT give free gym memberships to employees as a part of an employment package. Gym-going employees will have a membership regardless of who pays. Others will take it and never use it. If $30-50 is preventing an employee from going to the gym, they don't want to go to the gym.
If we instill in children the importance of being physically active at a young age they will be more likely to have a healthier life style in adult hood. This will save money in healthcare cost because there will be less medical problems due to weight problems.