This sounds really stupid, but how do I walk in to a gym? I bought a membership for planet fitness last week (there's one really close to my house). But I don't know how to walk in. They didn't mail me a membership card or anything. How do they authenticate their members? Am I meant to just walk in and start pulling on the machines?
I only want to work my back. I have bad posture and it's difficult to swallow so I want to work my back.
How do I walk up to a machine? Am I supposed to wipe it down afterwards? This implies that I must bring with me a towel.
And how do I know which machine is the back machine?