The ladder, from an hour to a whole night
The duration ladder is the set of lengths a booking can take here, from a single hour up to the eight hour block, with the rate for each fixed in advance.
Five rungs, one guest, one therapist: an hour, ninety minutes, two hours, three hours, and the eight hour block. The first four climb in step with the clock at a single hourly rate, and the block is a fixed sum that sits below eight separate hours. Two therapists in the room cost double the hour, a couple with one therapist costs that same double, and a couple with a therapist each costs four times the lowest rung.
The season nudges the rung
In a mild month an hour is a whole session and most guests need nothing more. In a room that started cold, the first stretch is spent getting warm, and an hour that gives fifteen minutes to that is not really an hour. Ninety minutes absorbs the warming without anybody noticing it happen, which is why it is the length most often suggested between November and March.
Where the longer rungs get used
Two and three hours are the usual weekend lengths in the dark half of the year, and three hours gets written more often in December than in any other month. In a hot week the pattern reverses: shorter sessions, later starts, and a preference for the hours after the temperature has dropped.
Choosing without overthinking it
Say what the evening actually is rather than picking a number first. A description of the room, the weather and how much of the night is free will get you a straighter answer than a length chosen in advance. Every profile prints the whole grid, so the figure is never a surprise.