Although our pastor is quite fundamentalist and conservative, we are expected to dress the way we would dress if going before a judge in a court-room for trial. In other words, if you can dress that nice for a human judge, you should dress at least the same way for God. I do not disagree with him and because I run the sound, all that work for the church, such as ushers are all expected to wear coat and ties. The only exception is the pastor may remove his jacket when preaching due to the high temperatures we have been having in Oklahoma (110 or so).
He also believes we should stand out from a non-Christian crowd where-ever we go and that includes nose studs, short-shorts and women should be careful they don't dress in a way that causes a man to lust after them. That is for their husband only.
I must say that I have to agree with him because as we tend to move towards liberalism it will not stop until it enters the theology itself.