Unless someone that you know that has a black membership at planet fitness they can bring a guest with them all the time. As long you or your friend has a black membership at planet fitness you will be fine.
If you have a friend who's a member, they can bring you unlimited times as a guest for free.
No, I don't think so. During the recent membership drive you could join for a quarter and pay the monthly fee per month with no commitments. You can stop whenever you want.
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