I have a friend who has a strict no shoes in the house rule and that is fine but I don't tend to take them off at other houses unless there is a pile of shoes at the door and I ask. My SIL has a no shoe rule as well and her floors are cold (no carpet) so we make sure we have socks in winter. We don't wear shoes in our house usually but I don't expect anyone else to take theirs off. Actually it's probably best they keep them on so they don't get crap all over their feet from all the stuff my DD's drop all over the floor