This isn’t the greatest resolution photo, but the subject matter can be seen.

Note behind  the Tivoli, there is a covered walkway to the building on the street and then from that building to the next and on down to the last building in view.  It may have continued to other buildings as well.  These buildings must have been bachelor quarters as this street had newer concrete bachelor quarters built on this street later.  My question is, do you know if these walkways were for Hotel overflow or for the bachelors to have access to the hotel for eating and R & R?  This is truly and interesting find.  I have drawn yellow arrows to show  the walkways in question.

 Further info, the hotel was building # 401, the bachelors quarters were 438, 440, 442, 444, this was Portebello Street