Samanta, 27, composed company in Amsterdam Centrum

Composed is the first word anyone reaches for, and it is only half the entry. Samanta arrives quiet, precise and slightly formal, and most guests assume that is the whole of her. An hour in, the formality has gone, the humour has arrived, and the evening has become a genuinely easy one. The magnetism on file is real but it is not switched on at the door; it builds, which is far more interesting than the alternative.

Her entry: 27 years old, 174 centimetres, slim, long dark brown hair, brown eyes, English. Sleek noir glamour is the style she claims, and the four photographs, taken against stone and water in strong light, do not argue with her. She dresses exactly to the room, and has an unusually accurate sense of what a given hotel restaurant expects.

Violin is the discipline, studied seriously and still played, which explains the precision in everything from her timekeeping to the way she folds a coat. Learning languages is the ongoing project, a new one every couple of years, an appetite Vanessa shares. Design hotels are the enthusiasm that will make her useful to you before the booking even begins, because she knows which ones in this city are worth the money and which are photographs, and Tiffany holds the same opinions. Her posting is Amsterdam Centrum. Most addresses inside the ring are ten minutes from her door, and the airport hotels are a single stretch of motorway away. Book her for a formal dinner, a concert, or a long evening in a good room. She is never late, never underdressed, and entirely unremarkable in a lobby, which is exactly what most guests are actually asking for when they say they want something discreet.