Whether you eat or drink (or dress), do all to the glory of God.
Colossians 2: 8-23 (NKJV)
8 Beware lest anyone cheat you through philosophy and empty deceit, according to the tradition of men, according to the basic principles of the world, and not according to Christ.
9 For in Him dwells all the fullness of the Godhead bodily;
10 and you are complete in Him, who is the head of all principality and power.
11 In Him you were also circumcised with the circumcision made without hands, by putting off the body of the sins of the flesh, by the circumcision of Christ,
12 buried with Him in baptism, in which you also were raised with
Him through faith in the working of God, who raised Him from the dead.
13 And you, being dead in your trespasses and the uncircumcision of your flesh, He has made alive together with Him, having forgiven you all trespasses,
14 having wiped out the handwriting of requirements that was against us, which was contrary to us. And He has taken it out of the way, having nailed it to the cross.
15 Having disarmed principalities and powers, He made a public spectacle of them, triumphing over them in it.
16 So let no one judge you in food or in drink, or regarding a festival or a new moon or sabbaths, (OR DRESS CODES),
17 which are a shadow of things to come, but the substance is of Christ.
18 Let no one cheat you of your reward, taking delight in
false humility and worship of angels, intruding into those things which he has not seen, vainly puffed up by his fleshly mind,
19 and not holding fast to the Head, from whom all the body, nourished and knit together by joints and ligaments, grows with the increase
that is from God.
20 Therefore, if you died with Christ from the basic principles of the world, why, as
though living in the world, do you subject yourselves to regulations—
21 “Do not touch, do not taste, do not handle,”
22 which all concern things which perish with the using—according to the commandments and doctrines of men?
23 These things indeed have an appearance of wisdom in self-imposed religion,
false humility, and neglect of the body,
but are of no value against the indulgence of the flesh.
Look, I didn't say that you should start dressing like a junky now. If for you, dressing elegantly to go to church makes you feel good or makes you feel that you are glorifying God in this way, do it, if you want to wear a tuxedo, do it. I'm not againt of that. I just don't think that's of great importance to God, not more than what you have in your heart. There is not a single verse apart from 1 Timothy 2 and 3 that talks about dress code in churches.
Now, I understand that there are dress codes for everything and that tells me that I cannot go to a wedding or a gala dinner dressed like a junky. This is how I see it, and this is how I expressed it in my initial comment.