Found this to be an interesting idea:
Students shelter in old folks' homes
Finding student accommodation can be hard in Germany, but in one northern city an unusual alternative is becoming popular renting out a room in an old people's home.
In Kiel's Kurt-Engert senior home, six of the 95 flats are occupied not by residents needing a little extra care in their later years, but by students. Attracted by the cheap rent around 200 per month the set-up seems to have become a mutually beneficial success story.
Youngsters watch out for the oldies here, and vice versa, said home manager Hermann-Josef Stevens. For the students that choose to live there, there are no special requirements or chores - they must simply be mindful of their neighbours.
And for 22-year-old Jan Hermelink, who knew first hand how hard it was to find a student flat, living with elderly neighbours has brought surprising advantages.
I've partied here with friends a few times, and it's never been a problem. That could be because they didn't actually hear us televisions here are always turned up rather loud.
Indeed history student Hermelink has built up a solid relationship with his 83-year-old neighbour, who seems to really enjoy his company. It's good when a bit of youth comes in, said Gerda Buck who added that she likes listening to Hermelink's stories.
http://www.thelocal.de/society/20130731-51141.html