Being bald since 20 yo I wear a hat almost the entire time I am awake. It helps with the sun and cold. I didn't wear it at grandmas table because my grandpa didn't wear his. Times have changed, as you would not find them eating at a restaurant, so I don't know if he would have removed his then or not. I think work has something to do with it, when you come in from the fields for dinner like I did with my grandpa, the hats came off and it was time to rest a few minutes. Most jobs these days are not labor intensive and that few minutes of rest don't mean as much to most folks.