Twenty-one or over, whoever knocks and whoever answers
Twenty-one or over is the age rule for everyone in the room: the guest who books, anyone with him, and every therapist on the roster, without exception.
The house works only with adults aged twenty-one or over. That applies to the guest who makes the booking, to anyone else who will be present, such as a partner on a couples booking, and to every therapist whose profile appears on the roster.
At the door
At the door she may ask for a photo document before coming in. It is looked at, handed straight back, and nothing is copied, photographed or written down. For a visitor this means one practical thing: keep a passport or identity card in the room rather than in the hotel safe at the bottom of a suitcase. If the question of who is present cannot be settled, she leaves before the session begins.
Why twenty-one
It is a line the house has chosen and applies without exception. The full wording is on the age statement, and nothing in a booking thread can change it.
Couples
On a booking for two, both guests need to be twenty-one or over and both need to have agreed to the booking. A couples booking is arranged on that basis from the first message.
If the question stays open
An age that is in question, with no photo document offered, is one of the six situations the booking terms list for breaking a visit off. Because by then she has crossed the city and is standing at your address, the price of the booked time remains due, less anything already sent ahead. The rule is the same whatever the format, the length or the hour, and it applies to a returning guest exactly as it does to someone booking for the first time.