I would expect that would be common, and no different from pizza delivery people.
I remember one nude swim night I attended where we had close on a hundred people attending. As it was a Christmas event, we ordered pizza for the night so the pair that delivered the pizza (a guy and a girl) were confronted by wall to wall flesh.
My next door neighbor rang the doorbell a couple of hours ago. I answered the door nude, invited him in and we shot the breeze for a while. He''s one of just a few people who expect me to be nude when they visit. I'm lucky to at least have a few!
Dominos Pizza delivery guy saw me and my friends naked last evening. Yesterday evening my close friend and his girl visited me to spend some naked time together. We three enjoyed being naked at my apartment watching movies, and ordered some pizza. When the pizza delivery guys arrived, i opened the door naked. He was in his early 30s. The delivery guy did not reacted unusually when he saw me naked. I guess he would have seen many of his customers naked :)
from the door he did see inside the living room while I was counting the change and I am sure he saw my friend and his girl naked in the living room more than once.
I don't know what he thought was going inside but he sure had a smile on his face when he left :)
A was supposed to go out to our local nude spot with an old friend, but she had to bail out because she couldnt find a sitter. Next thing I know, I get a text from a visitor from out of town. We had breakfast and she asked if I had any other suggestions. I said Lets go skinny dipping! She said YES! So, we went down to Mira Vista for a few hours and swam and talked. A good Saturday.
My friend and I were on our way to Marquessa nude beach in Spain. We had already stripped off and sort of covered out intimate parts with something flimsy. A young mum drove up with her two young children. I saw she had a completely flat tyre and we offered to change it. With all that bending, crouching and kneeling to jack the car up and change the tyre our flimsy covers hid nothing. She and her children watched intently and then thanked us. We went onto the beach and stopped to photograph this sign, only to see them walking past.
Later a man saw me waiting for a tattoo through the shop window. Attracted by my piercings he came in for a closer look, particularly at my PA.