Hilton has quietly been rolling out its ‘rooms for day use’ service over the last few years. This allows you to book a hotel room for the working day – the idea is to compete with the likes of Regus, Spaces and WeWork who rent private offices by the day. How do you book a Hilton day room? Looking at Wednesday 19th, the best deal in London is the DoubleTree by Hilton London Excel for £89. This is different to Marriott, where day room bookings do NOT earn Elite Night Credits, just points.