Article continues below advertisementA night in has changed. It used to revolve around a television, a takeaway, and whatever happened to be on. Now it often runs across several screens at once. You stream something, glance at your phone, answer a message, and open a game in the gaps.That shift created a comfortable place for social casinos. They do well in short bursts, they use familiar game formats, and they fit neatly into the stop-start way many adults now relax at home.