Goth clubs are perhaps one of the freakiest places on the planet. I've been to 3 or 4 in the past and they are really not for the faint of heart. If you go to a Goth club dressed in normal clothes then you'll be punished, normally be receiving a broken bottle of beer in the face.
These clubs are typically illegal drinking dens which don't have proper licences. Instead they pose as restaurants and can only sell drinks through the acquisition of meal tokens.
It's crucial to be cautious when in the toilets of a goth club as the chances of walking in on a gangbang of some description are extremely high. Goths do not know what the word inhibition means.