A hotel is to open a wing which will be available to women only.
The rooms have a "movie star" backlit make-up mirror
Males will be banned from the 68 rooms of the new section of the five-star Grange City Hotel in central London.
Even room service staff will be female in the seven-storey building that will open at the end of August.
The Grange Hotel Group offered the service after research showed half its customers were women, many of whom felt vulnerable when travelling alone.
It said the rooms would contain "female-friendly" features such as illuminated wardrobes, a backlit make-up mirror and extra-powerful hairdryer.
And for security every room will have a spy-hole and chain lock.
Barry Wishart, from the Grange Hotel Group, said: "We noticed that our women travellers were frequently asking for the same things.
"Traditionally hotels have always been male-centric, particularly business-class hotels."
He admitted the ban on men could not be fully enforceable if, for example, a guest wanted to invite a man to her room.