To answer the two questions you posted.See my OP for my thoughts here. I guess my reasoning back in the day wasn't so original after all.
So, I have to shower before the worship service? Legalism!! (Just kidding)
1. How do you dress for worship? I like to put on dress slacks with what I hope is a nice dress shirt.
2. How do you believe you should dress for worship? I believe one should dress nicely given what they fits within their means. Whether we like it or not, how we might look to others that may be visiting in both dress and action, particularly potential non-believers, says something about our character. We not only attend worship services for worship, although it should be top priority on the agenda, we also attend for fellowship so we should dress presentable.