I like this place.
Body English at the Hard Rock hotel is probably the best place to party off-strip (and after the Palms, of course). The design of Body English has a vintagey-rocker feel, which is cool. Somewhat upscale but you can still let your hair down. I wouldn't put this in the same category as Tryst, Pure, or Tao in terms of luxe, but it definitely has it's own appeal. There is no other place in Vegas like Body English.
The club itself is rather small, so you MUST get there either a) pretty early, or b) so inebriated that you don't care how crowded it is. There really isn't that much dancing space. But the music is cool and it's a positive vibe. A different crowd than most of the other Vegas clubs I've been to, but always a good time.
Make sure to go on a hoppin night, like Friday or Saturday- Sundays here are generally not that fun, as other Yelpers have said in their reviews.