I've seen this at a few churches I go to. At my old Lutheran church, people would mostly bring junk food to coffee hour. I guess junk food is almost like soul food for that demographic. It got so bad, it contributed to walking away from the church. It really hurt the credibility of the religion for me in some ways. Beautiful worship, good preaching, but it didn't seem to pan out in any practical way as an ethic except middle class conformity and bourgeois morality. Every other person was on some kind of pharmaceutical drug or had some kind of serious health problem that was clearly related to lifestyle.
What was really shocking was how many young people at the church were on psychiatric drugs, and/or no longer attended services. You could really see how there's alot of quiet despair going on under the surface, not much of a hint of abundant life in the Johanine sense. The people were conventionally pleasant, kind, and civil, but the spirit of conformism kept that lamp under a bushel. In the end, I just felt that, along with other things I encountered, was like an oppressive spiritual "neuroleptic", a kind of religious haldol or thorazine. If I had been more socially connected, I would have tried to make a difference. But as it was, I decided to move on, a decision for which I still feel some sadness from time to time.
My new church I go to (Congregationalist) is a little healthier, but I think that's mostly because it's more ethnically diverse and socially liberal.