Oh. It's not just me then. I feel like at times, their clothes are really out of place.
In the Netherlands at least, you can go in whatever clothes unless it's a special club :) Amsterdam has more of those special ones but there are enough clubs that you can go in (but have closed shoes on though).
Yes their clothes are too casual for clubs settings at least thats what i think.
It seemed normal edm club attire for me.
It is just me but these two go to clubs in beach like clothes. I have never seen people dress like that at clubs before.