This is for people that I live with.
I don’t mean any lame team building exercises, but casual group activities. It could be something mundane like organizing a trip to the store together. Movie trips would also be fine as would showing something on the home projector, though I feel like there’d be more distractions and temptation at home.
Group art projects are fun. For example, you can collect a bunch of art supplies and select a common theme, then have everyone create a collage on that theme.