Movies and TV shows like to take creative license when filming in Las Vegas. The NBC show "Las Vegas" was famous for their fictional hotel which seemed to change locations up and down the strip every episode. In the movie 21 the characters had a suite at the Hard Rock (off the Strip) that seemed to magically overlook the Bellagio fountains. The iconic Vegas movie Swingers had the characters entering the Stardust, but the interior scenes were actually shot at the Fremont hotel. The Hangover actually did a pretty good job with their Vegas exterior shots. I love the scene where they are overlooking the strip from Caesars and then night fades to day focused on Flamingo and Bally's.
Earlier today I saw the new release Get Him to the Greek. Aside from looking like a reasonably funny movie, I heard that part of the film was in Las Vegas, which was an added incentive to see it. Turns out the Vegas scenes are kind of minor. The characters have a suite at Planet Hollywood. They then see the Rat Pack is Back show at Plaza. After that they are partying in another suite which I guess is supposed to be their original suite at Planet Hollywood. The only problem is the view overlooked the strip from a vantage point which looks south from Trump. The characters then exit the hotel and appear to be around Fashion Show Mall, which makes sense... but then the camera cuts and they are suddenly in front of Paris going north. I'm sure 99% of the moviegoers wouldn't notice this, but it was a pretty obvious goof for Vegas geeks to spot.
So bottom line, Get Him to the Greek was a pretty funny movie, but if you were going for the Las Vegas scenes you might want to wait for DVD.