A lot of the things we do on a daily or weekly basis have ways of doing them that can either be private or communal, some of these which we do not think to consider as having that characteristic.
For example, bathing in the Roman Empire used to be communal, but then Rome fell and citizens in the splinter countries began taking baths privately.
Receiving mail is another example. There are countries which don't have mailboxes and everyone gets their mail at the post office in the PO boxes. It was the United States which pioneered the idea of the modern mail system, which is why we associate it as a private act.
There are activities as well which don't have any history as jumping between one or the other that might benefit from it, for example I think towns might benefit if internet was free and freely accessible but only at the local library.
What's a non-communal aspect of life you think should be communal?
Maybe it's being a product of my environment but there are so few things that are currently private that I would want to have to do publicly. I don't generally really want to contend with other people not shared facilities more than I have to. I definitely don't want communal bathing. I can stomach public transport, which is already a thing, but then I tend to spurn it where I live more often than not because of the lack of viability and convenience. I guess I would say I wish that where I was specifically that transport was more communal than it is now. I don't see how it really could be though because of the nature of where I live and the lack of density and the bad urban planning that led to everything being very spread out, but it'd be nice.