My mother and my mother-in-law live in the same assisted living community. Taking one out without the other needs an element of confidentiality so the one left behind is not jealous and does not accuse you of paying too much attention to the other one…sometimes you can’t win…
We do have group visits as well and those go real well. Even though both mothers live in the same assisted living community, it doesn’t mean that they have to be best buddies. That was one of the agreements that we had with them. It was much easier to visit if they both lived in the same community but we told them that there would be no hard feelings if the didn’t socialize with each other. We can’t force them to be friends just because their kids were married.