Our couple's T is from the same state we moved from last year, in fact the next town over from where we lived for a while. My wife and I spent a lot of time in that town, so we talk to couple's T about it at times. A huge problem for us is missing home, and also finding things to do in our new state. Couple's T has a few of the same interests as we do, so she will let us know of activities or places to visit. It's in the context of our therapeutic relationship though, so it works. I do not have the same conversations with my individual T as it is not relevant to therapy with her. The few times we talked about mutual interests were in relation to developing coping skills/inspiration to keep going forward. I don't think a conversation with individual T about good restaurants or live music venues would have much bearing on my trauma therapy, but those conversations happen a lot with couple's T. It's all about relevance for me. There were times I have spoken to other T's also about some personal stuff, but it was always kept within the structure of the therapy.
I have to admit, the days we talk a lot about home or extra-curricular activities with couple's T are also the days we don't get much else done. It was more important when we first moved here, but now I try to keep the focus on our relationship issues.