For at home date nights, Hajime cooks for all of them (he makes something vegan for Gundham) and they all lay down on the couch and choose a movie to watch then fall asleep cuddling on the couch.
When one of them is sad they all form a cuddle pile on the bed with the sad person in the middle and cuddle them and give them kisses on any visible skin to make them feel better.
Gundham and Kazuichi have been banned from the kitchen because they accidentally almost burned the house down trying to cook for Hajime and Nagito.