Just as a general point whilst it’s often possible to whistle up hotel room, perhaps with a bit of effort, I’ve seen at one instance of Force Majure where the only sensible choice was for crew to sleep in offices and briefing rooms.... LHR, snow and several thousand stranded pax being dispersed to on and off airport hotels .... and public transport going to hell in a handcart before crew were stood down.
However there was never any question of any of those crewmembers being required to operate the next day.