The story in this episode takes place in and around Houston, Texas, which at the time had a population around 1,150,000.. A little over fifty years later (2018) the city's population was estimated to have grown to 2,464,000.
By 1966 the prohibition against women showing their exposed navels was no longer enforced but producers were careful not to flaunt it yet. When Susan Carver (Laura Devon) is shown walking toward the pool from a long distance one can see she has an exposed navel. But as she gets closer, she makes a point of holding her towel in front of her midsection, presumably not to alarm anyone not yet used to seeing women in low cut bikinis.