If you're looking for these kinds of attractions in Venice, then you're likely to be disappointed. It comes as no surprise to me that the official Venice tourism site (
http://www.turismovenezia.it/eng/dynalay.asp?PAGINA=407 ) makes no reference to nightlife at all. Venice just isn't that kind of city. If you want beautiful architecture, imposing museums, magnificent churches, outstanding art, classy restaurants, fine opera and classical music then go to Venice. If you want clubs and tattoo artists try Southend.
Chris