I'm not really cool enough to be in the know about things like this (I was hoping perhaps 5chw4r7z had the scoop, but there's nothing on his blog), but by virtue of proximity, I can report that a new nightclub has opened on West 4th between Plum and Central, in the space previously occupied by Bang. The new club is called "Velvet," and was open this past weekend.
I can't seem to figure out the new club's hours or who, exactly, is running the show (though I think it's the guys behind Bang/FB's/Club Clau/etc.). Some of the club's residential neighbors have complained about noise during the club's opening, so one hopes that the club will work to be a good neighbor. Velvet's owners should remember that a busy nightclub in that block is a relatively new phenomenon, and many of the street's residents pre-date Bang and thus weren't looking for the residential experience of an entertainment district.
If anyone has some info on the new club, feel free to post in the comments.