I've seen the movie today and I have to make some corrections:
The following mentioned movies are the same one.
Hotel der Luste
http://egafd.com/films/details.php/id/h0235
This is a release from 1994, 95 or 96
Hotel der Luste? wo der Kunde noch K?nig ist!
http://egafd.com/films/details.php/id/h0399
This is the same movie, but released on DVD in 2005
Danielle is announced as ?Nicoll?
Kelly Trump is announced as ?Tanja Gol?
Nina is announced as ?Angel Heart? (could be the same as -->> http://egafd.com/actresses/details.php/id/a0665 but without a picture I cannot identify her. I saw ?Nina? in a few porn scenes in Magma movies like ?Strassenflirts?)
XNK2523 is announced as ?Kathi Burg?
Dru Berrymore doesn't appear in this movie. This is one of the cheap ?four girls and four boys video trash?
Scene 2 (Decribed as blonde with curly hair): XNK2523 (?Kathi Burg?)
Scene 4 (Described as ?A blonde sits on a stool?): This is Nina.
Scene 5 (Description ?the woman with the blue silky mini-skirt ?:) It's Nina who masturbates