Cleaning in room for sunbeds block 7

There is a room (outdoor) under our block where we have the sunbeds.  In that room there are different things that is garbage and need to be thrown away.  The «room» also need to be cleaned/washed.  Who is resposible for that?? The community?? The owners of the flats in the block??                            Karl-Erik Sørensen.     Apt 706