Gary Thomas, one of my favorite authors, addresses a topic that has been bouncing around in my head for a while now in his blog. You can read his post here.
The issue being, the church tends to have its hobby-horse sins that it loves to "be against." However, gluttony is not one of them. Yet, there is a serious problem with it in our society and our churches. It is an issue of self-control and self-discipline.
The four times a quick searched pulled up "glutton" it is always paired with "drunkard." I've heard many more sermons on the latter than the former. (Deut 21:20, Prov 23:21, Matt 11:19, Luke 7:34)