In the episode "Snow White and The Seven Brady's", right before the play, Alice claims that she has eaten the last apple while rehearsing, therefore Mike and Sam have to rush to the grocery store to buy some more apples. Watch when they pull up and Mike walks inside the store. When he opens the door to walk inside, you can see through the crack that the inside is completely dark. Even on the outside of the "store", there is black paper covering the entire windows. It isn't hard to miss.You can tell that the "store" is just a fake prop, probably an abandoned building that they dressed up to look like a store. Which doesn't make sense, because on another Brady Bunch episode," And now a word from our sponsor" they do use a real grocery store.