Sapa is also famous for its love market, which takes place on saturday evenings. The love market of Sapa used to be the place to find a partner to get married. With the tourism, the real love market does not take place anymore. Currently you can only see a representation of the love market. Do not miss it anyway if you are staying here a saturday night.
Young Red Dzao hill tribe used to come to Sapa to sing songs to the opposite sex. Girls sang the songs hidden in the dark, when a boy found them, and if they matched together, they disappeared into the forest for three days. Some of them got married after that. Currently you may spot some young locals singing in the dark, but they are not looking for a partner, they are looking for you. They will sing a song, and ask for a tip afterwards.
Vietnam Travel - Sapa Travel Guide