LLC’s are great for a kid that wants to meet people but may be on the quieter side. Kids have a shared interest and they are looking to connect with people in their dorm. They also tend to attract students that actually put some thought into their living situation beyond living in a dorm without adult supervision and partying.
Substance free dorms are tricky. You never know how the numbers will shake out with kids that just want a substance free dorm vs kids in recovery vs kids with strict moral or religious views that they either push or don’t want challenged.