It strikes me as a little strange that they'd break off a separate and distinct locker room for boys aged 7-17 and dads with (their, presumably) boys. Is this sign really saying there's a little fear of boys being gazed and preyed upon if they undress in the general men's room?
I don't see this at other gyms I go to. I imagine it's costly, but it seems no expense was spared at this particular YMCA. There's even an automated swimsuit water-wringing device. You put your shorts in the centrifuge, wait a minute and they come out nearly dry.