Public pools often have lanes in them so they could easily only allow use of alternate lanes and limit numbers and time in the pool. Won't help young kids who cannot swim and just want to splash about. Maybe the square idea in a small pool for non swimmers. I am sure they are working it out as we are discussing it. They already have senior hours and/or set times for school kids, early hours for serious swimmers etc. The water is already chlorinated so I don't see a big problem.