Honestly, as long as community bonding and relationships are forming, I don't worry about which section of my forum is getting more activity. As long as my members are engaging, having fun, and talking, that's all that matters at the end of the day.
If they want to hang out, talk about coffee, movies, or games, then I'll take a seat with them and do it too. Even if it's in the off topic area, I'm building a community, I'm not building a tent that's closed off to the entire world.
I'll be apart of the discussions as well, as long as they're creating discussions anywhere. That's the best, let them talk, let them have fun. That's what community building is at the end of the day.