In reply to FockeWulf:
No idea about COVID-19, obviously, since it's still developing. Depends on a lot of factors. I wouldn't have high hopes though.
Some basic hut advice back from normal times:
You need a "Hüttenschlafsack", which is just a cotton, silk or synthetic sleeping bag liner. Just a big sack you sleep in under provided blankets for hygienic purposes. This is required! I upgraded to a very light 300g down sleeping bag, as it's more universal, about the same weight and useful for an emergency bivvy, but any cheap sleeping bag liner will do. And your own towel, it's not B&B
Sleeping is usually communal ("Matrazenlager") plus sometimes smaller rooms. Matrazenlager can be anything from bunk beds in a room for ten, or just a long row of mattresses side by side for twenty people.
Take a head lamp and keep it near your bed, nobody wants you fumbling in the dark in the communal sleeping space if you need a late night pee, waking the other 20 sleepers (and many huts turn off non-essential electricity during the night, including lights).
Take ear plugs (see recent thread on snoring)
No boots or shoes inside, there is a shoe room at the entrance (sometimes with shoe driers) for wet gear (incl. ropes), either bring slippers, crocs, thick socks or sometimes you can use provided slippers.
Consider OEAV or DAV alpine club membership (standalone or via BMC reciprocal card). You get 30-50% off the accommodation prices (you get the "Mitglieder" member prices, without it it's "Nichtmitglieder") and a very good rescue insurance which basically pays for itself after a few nights just with the savings!
Be considerate - there is a reason for the typical early curfew.
Bring cash - while some huts do have card terminals, they still rely on GSM service which might be spotty at best, depending on weather.
And finally, take out your trash.
Post edited at 15:18