Outcall is a visit that runs in one direction only: she brings the gel, the waterproof cover and her towels to your address, and you go nowhere at all.
Outcall is the name for a visit that travels one way. The therapist comes to the address the client gives, and the client remains exactly where they are; there is no door belonging to the house to be found anywhere in Amsterdam, since it has never kept a studio, a treatment room or a shower of its own. Whatever it confirms is, for that reason, an outcall, whether the address turns out to be a canal-house attic, an apartment rented for a long weekend or a room several floors above the Zuidas.
For most kinds of massage the difference between visiting and being visited is a matter of convenience. For nuru it is closer to a question of material. The technique asks for a warmed gel, a covering that keeps a mattress dry, a generous pile of towels and hot water close at hand, and a studio would ordinarily keep all of that in cupboards of its own. In an outcall the cupboards travel. One unremarkable bag holds what she needs, and the room she is shown into contributes only what no bag could carry: a bed, a bathroom and a radiator willing to be turned up.
Very little beyond an address given with care. What helps is the kind of detail a stranger needs to reach a door late at night: which entrance is still unlocked after midnight, whether guest floors can be reached without a room card, whether the bell of a rented flat carries a name other than the one in the thread. Rooms that warm quickly and bathrooms with a strong, dependable flow suit nuru particularly well, and the guide to nuru in a hotel room and its companion on rented apartments take each kind of address in turn.
The reach of the outcall is Amsterdam, and it ends at the city's edge. Forty-five therapists are spread across the rota so that some are free through the small hours as well as the afternoon; each central address shares a single arrival window, and Schiphol, together with the hotels that ring the runways, is reached by arrangement instead of on the ordinary clock. A request for a town beyond Amsterdam is declined politely, however close it may look on a map.