Over the years I have been a member of several different gyms or fitness centers. I am wondering how one month, the fitness center requires a membership fee when signing up and then another month they do not. It seems unreasonable that those who have been attending and paid lets say their $99.00 sign up fee are know workout with others who just have to pay their monthly. I feel ripped off when I join a gym and pay the sign up fee only to see posted the next month no sign up fee. Anyone else notice this?