Twenty-one or over, for the guest and every other person present
Bookings are accepted only from people twenty-one or over, everyone present must be twenty-one or over, and she may ask to see a photo document at the door.
This is the one rule in the terms with no exceptions and no scale. Bookings are accepted only from people who are twenty-one or over, and everyone present during a session must be twenty-one or over as well.
What the booking message says
Sending a booking message is itself a statement that this is true of the guest and of anyone else who will be in the room. A traveller booking weeks ahead for two should make sure the second guest knows this before the trip, rather than meeting the question for the first time at the door.
At the door
She may ask to see a photo document when she arrives, from the guest who booked and from anyone else present. She glances at it a single time and returns it at once. It is not copied, scanned or photographed, and nothing from it is written down. A passport or a national identity card brought for the trip serves perfectly well.
If it cannot be settled
If she cannot satisfy herself that everyone in the room is twenty-one or over, she leaves before anything begins and the visit ends there. That decision is hers, and it is not open to discussion in the corridor.
The roster
Every woman listed on the roster is twenty-one or over too. The age statement sets out the position in full, and the terms carry the same wording as part of every booking.