Blue hotel
A Blue Hotel is a hotel, motel , etc., that rents out a room for an hour at a time. Couples ( straight, gay, whatever) go there for quick, discrete sex. They then return to their routine family life. Some married and partnered couples go there just to get some privacy while having sex. Recall that in many places generations of people live in the same very small spaces where privacy is impossible. There are several other names for these hotels, which you can find elsewhere on UD or on Google. These hotels are common in most towns and large cities in both hemispheres.
The couple decided to go to a Blue Hotel to get some privacy and be more spontaneous, intimate and noisy during sex.