The DLH are very accommodating of people in robes, slippers and pyjamas.
I went down to the lobby in just pyjamas and slippers one morning to check something on the internet (just a 5 minute trip).
I also spent a good hour sat on the floor on the first floor landing (above the lobby) in pyjamas and DLH robe / slippers because I had no laptop battery left and the only working sockets had no seats next to them
On both of these occasions, nobody (CM or otherwise) said a word and in fact the CM's greeted me as they would anybody else in the hotel