Twenty-one or over, on every booking
Every client must be twenty-one or over, on a layover as anywhere else, and a therapist may ask to see identification at the door before a session begins.
The house takes bookings only from clients who are twenty-one or over. There is no exception for a short stop, a long one, a couple where one guest is younger, or a booking made by someone else on a younger traveller's behalf.
At the door
If there is any doubt, she may ask to see identification before the session starts. A traveller on a layover will have a passport in the room anyway, so this is rarely more than a moment. A booking where the client cannot show that they are twenty-one or over does not go ahead.
On this site
The site itself asks visitors to confirm their age before entering, and the age page explains why. None of the copy here is written for anyone younger, and none of the booking routes accept a request from anyone who says they are.
Couples and groups
When two guests share a session, both must be twenty-one or over, and both may be asked. Colleagues travelling together on the same connection are each responsible for their own booking; one traveller's age is never assumed from another's. The booking thread entry explains who should write when two people are involved.