The jargon term, slack, comes to mind, in the concept-cluster of the old Google 20%-time, Slackware Linux, and Church of the SubGenius.

and Bob with his Billard pipe, now as you brought these up!

My father did not smoke, but many of his colleagues did which some did look 60's bit like Bob. For some odd reason I still kind of remember what tobacco and pipe smell felt in room when I begin to think of it, like now in this occasion.

In general use though slack has an even stronger connotation of e.g. slacking off and not doing anything useful with the time.