i went there back in december because vnv nation was playing. i had a good time. not just because of who was playing, but because of the djs. the atmosphere is a bit creepy. i guess i'm just not use to all of the goths in one place. (haha)
i do recomend going there. the djs do spin some pretty good music. but i have to warn you, for some reason, people there dance a little weird. i thought i danced weird, but man i'm normal compaired to those people. (my friend asked the dj to play you'll dance to anything by the deadmilk man. the dj thought the idea was humorous, but unfortunately didn't have that record with him)
as for clothes, wear whatever you want. that's how i am. could care less what others think. i might go there in the summer, in which i'll be wearing shorts and bright colors.
well, hope that gives you some info. have fun when you do decide to go.