Tried googling this weird phenomenon in my country and luckily it only popped up once, at some religious festival in a different town. But the google maps add-on for marking these sorts of events is a great ideal fantasy. Note, here it's considered uncomfortable and rude to stand closer than 3 feet from someone, 5 feet is the usual interaction, cuddle-parties sounds extremely disturbing and makes it difficult to NOT imagine it being foreplay to a giant orgie.