I've built 3 domes, each with a Sanatorium, covering all 7 treatments for colonists. I put in a gym, a grocery, and a diner. But I'm having trouble keeping the grocery and diner staffed. The colonists I assign to them tend to leave after a short while. I'm beginning to think that perhaps for a Sanatorium dome, a grocery and/or diner isn't really necessary. What do you think?