i think if you can get good remix's to songs than this is your key to "standing out" from the other mobile DJ's whenever i play a party or birthday, everyone always wants to know where i got that remix from and some think i mixed it on the fly (what they don't know wont hurt them ) so this is my advice to you, always have about 6 remix's on your songs ready, and ready the crowd for what type they want (eg house, disco, electro, dubstep) and this way you will be able to put a chart topper that will also keep the mood running the way the dancefloor needs to flow. for example, if you see a circle forming and people start shuffling, bust out some dubstep remixes even you just beat match the crowd will think your doing some mixing