nightclub

Hello everyone! I will be coming to Berlin soon with a friend. I'm bi and my friend is straight (but very open-minded) and I'd like to show him the nightlife of Berlin... I only came once a long time ago, do you have any advice on what gay, bi or straight parties/clubs to absolutely go to...

Looking for videos of couples dancing, the dirtier the better. I'm looking for Guy/Girl especially.

I may be in Las Vegas for a luxury travel convention in August. Any recommendations for nightclubs that two English blondes could maybe have some fun in? Preferably classy and definitely sexy.