Recently found out this is a thing beyond the obvious Planet Fitness.
I think this is a completely BS thing. I will admit it is a genius business model (Keep membership costs so low people will keep it even if they don't use it, discourage the culture of people who will put wear and tear on your equipment, and could possibly teach newcomers something). I will give credit to the idea from a financial standpoint.
From a fitness standpoint, it's completely pointless and is the embodiment of our lazy, overly PC, overfed American culture, at least IMO. It would be better for our country as a whole if there was less of this "you're fine the way you are, but if you want to work out you can but whatever is ok" and more of the attitude "you are obese, here is the means and knowledge to fix it - now put in some work."
That's just my .02. Debate