Green’s Dictionary of Slang

a lodging house.

1823		‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 63: It is not every ‘roosting-ken’ where they will let people lie a bed all day.
1899		‘Pot’ & ‘Swears’ Scarlet City 48: I could have taken them to some swell roosting-shop.