Try 8th Deadly Sim for grungy floors. They have lots of grungy walls and I think they have floors, too. It's a paysite so check the booty, too. I think it's called 8DS on the booty.
For the vamp poses, try JD's Nightlife Pose Box at JD Movies.
http://www.jd-movies.com/nlanimbox.php It, of course, requires Nightlife to work.