He isn't around so I assume that he's working with one of his many jobs or chatting it up with Minako.

[ She doesn't care how bad the impression she gives is (what with Archer talking to teenager girls all the time) or for her manners as she shuts the door behind him. ]

He doesn't live here anyway. [ Pointing a finger towards a door in the wall that shouldn't be there in these apartments. ] He lives in there and no, it isn't a closet.