Shoes are optional around here too. We have been very lightly dressed this month. In fact, one pair of my "summer shoes" (flip flops) broke when we were all out dancing. I just left them there and walked to the car barefooted.
Around the house, also very lightly dressed. For me, that means swimsuit with a wrap on, or a summer dress. For the boys, shorts or swimsuit. And I can't tell you how many times I have walked to the front lanai and there are a pair of shorts and boxers on the steps - the boys have just changed into their swimsuits on the lanai.
The shower is even outside.