Who needs these people? All they do is ‘rent a friend’. That is the opinion of Mike Grondahl, CEO of Planet Fitness Gyms. And while he has a right to that opinion, he is doing more than that. He is going to eliminate all personal training sessions at the gyms. Wow. Here is the article from Club Industry Magazine. Planet Fitness is discontinuing personal training at its clubs, according to CEO Mike Grondahl. In a letter written to Planet Fitness owners, Grondahl says the Newington, NH-based company’s corporate-owned clubs will end all personal training sessions by Dec. 16. Franchisees will have until the first quarter of 2011 to end their personal training sessions. “The decision to end personal training has been long and arduous,” Grondahl wrote in the letter. “It goes right to the essence of our business model. We’ve always tried to keep personal training to a minimum at Planet Fitness. But the problems related to having trainers in our gyms have never completely gone away. Lately, they’ve gotten worse. Too many trainers are pushing PT on our members, the vast majority of whom have zero interest in it. These clubs are opening themselves up to trouble.” Grondahl says…