Play tracks that have energy but that are not “famous”. If you play an electro-house/EDM type gig then you should avoid playing tracks like Animals or Greyhound, stuff like that because the DJ right after you might play one of those famous songs. Play tracks that have the same energy but that are not famous.
A few examples : songs by Leventina, Cazzette, Hard Rock Sofa, Sick Individuals… Random clubbers may not know the songs but they will probably like it. Avoid Garrix, Dimitri Vegas & Like Mike, Hardwell and artists that may be played by the next DJ.
I hope that I’m not wrong with your definition of “electro-house” btw… Haha.