Well, yes, when I said I WFH all the time, we actually go in every other tuesday, where we have a couple of meetings, then go down the pub at lunchtime (when we were full time there we never went down the pub), then chat - so it is more a sociable time. It is nominally a work day but we go home earlier and nothing really gets done, even indivual sessions where you need to help someone discuss something don't tend to be as productive as on teams as its generally just too noisy with too much going on.