Hungover, at 1pm, on a Saturday afternoon, with munchies and nothing in the 'fridge...it is
then acceptable to put on a long coat over PJ's to do the mercy dash to the newsagents (which MUST be less than 1 minute walk away) in order to get the paper, a pint of milk, paracetamol, a box of Mr Kipling's Cherry bakewells and a tube of Pringles...
...that, IMHO, is the only time it is acceptable to leave the house wearing PJ's.
Vicky