SBF was in a Stake Building. They are usually a center in the community of nearby mormon churches, each of which usually hold 3 + congregations. Stake buildings usually are the cultural center for larger events as well as normal weekly meetings of which there are several for various groups. Young men, priesthood, young women, whatever the ladies groups were, any community or charity kinds of functions. Primary. Forgot all the kids stuff, then family events, cultural festivals---I can go on. They do plays, have musicals, dances. Those buildings stay kind of busy. Plus any local missionaries have their meetings there.
Missionaries are loved and respected and usually are invited to dinner at homes a few nights a week. They usually sit on the front (stage) area (by the choir), but since SBF was with them, they kept him company in the normal seating.
I think the LDS church is contracting in a lot of ways, even if the strict numbers of members aren't dissolving, the faithful adherence to sunday meeting is probably less for those who haven't left because they have gotten the message that it IS just a social club. I think the religions credibility has been shot for those who care about how "true" it is. They have testimonies that it is just a nice bunch of people to hang around with. Not that their "gospel" is actually true. So, it has become a bit of a shell of its former self. I don't think many are even pretending any more that it is really about a deep truth, but on the positive side, the church more than ever is emphasizing all the warm fuzzy positive messages of Jesus, so that isnt a drawback if they refocus on that, I think. But yes, I still have overwhelmingly positive associations with them and my dear friend is LDS and I have known her since I was in the church in my late teens.