Planet Fitness should be your answer
I'm sure if you talk to management they will allow. Prob cost alot more than $10 though.
Just buddy-up with someone in the gym who has a black card. Get in free cause you'd be their visitor. If your planning on going everyday for the month probly you would consider getting to know more than just one person or im not sure if they would allow you to keep going back as a visitor after more than just a few times.
I think that should be a possibility, as my membership is a no commitment membership. However I agree with one of the previous commenters, I would check with the Jackson planet fitness.
Thanks! Your answer is awaiting moderation.