Dressing for the church nightclub?

Now that I've been at university for the last few months, I've noticed two distinct types of students.

Those who dress down and those who dress up.

Some students, and I would fall more comfortably into this category, dress like they've just rolled out of bed.

Other students look like they're about to hit the nightclub, dressed for a smart-casual (or above) social occasion.

A similar thing plays out in church.

Some attend dressed for comfort - shoes optional.
Others attend dressed for the nightclub - makeup compulsory.

I wonder, is one better than the other?
Do you, at the start, begin quite formal and then progressively slide towards casualness?
If so, is this a good thing?

It could be argued that your dress standard moves due to the relationship with God and the people in the church becoming less of a 'special event that you need to dress up for.'

But, again, is this move in a positive direction?

Ultimately, I'm not going to set a ecclesiastical dress code, nor do I think it would do any good for a church to set one...

But, I think the core issue is the heart of a person.

What/Who are they dressing for?
Who's attention are they trying to draw?

Most tellingly, are they willing to change, to an extent, if the way they dress is a stumbling block for someone else?