If you're staying in or close to the MGM Grand, it's worth a quick stop. Go early and get in cheap/free, or look for the guys in suits on the casino floor handing out wristbands. Your lady friends will get free drinks because of it too.
Music was decent, IMHO 1 good song 1 bad, mix, repeat. Danceable though. Very little seating and small dance floor so get ready for it to get packed.
Not worth full admission, so if you miss the free/cheap windows, I'd take your dancing shoes farther down the strip.