Several Hiltons I've used have outdoor smoking areas, some with shelters for inclement weather, and nicely arranged with fences and plantings, so that they are good outdoors areas for smokers and non-smokers alike, and enough space for one group to avoid the other if desired. The Vassar guest house (we were guests at a wedding) had a pleasant area with tables, umbrellas, chairs and ashtrays. So these places exist, and some are at hotel chains.