What is your purpose of joining a gym? Weight loss, Muscle gain? Body building?
Unless you're aiming to be a competitive body builder, your own body weight is more than sufficient for most muscle strengthening exercises.
http://www.shape.com/fitness/workouts/no-gym-all-over-toning-plan
My purpose of going to the gym is to increase my existing muscles, not to lose weight or to become healthier since I am already very healthy and look much younger than my age.
