I just send them all if the place suits them or not. For sure some won't have an interest but it's still a good place to socialize and see things happen. I do use community lots quite a bit though and don't like my sims stuck at home. I also have a few specialized dorms, the police academy, the teaching hospital and the science dorm, so those sims tend to all want to go to similar places. Does CLT work on rental houses at uni or not there either?