"You see, a regular DJ set will normally run at an hour but if you’re working a club, it’s common to hold down the floor for the whole night, which can run you at around 6 hours. In an hour it’s easy to burn through around 20 tracks if you’re just playing back to back. That’s around a 120 tracks per-- night, which is not too shabby.
You have to know these tracks though. You have to know how it goes, where you can transition in it, and whether the genre will fit the current mood of the crowd. As we’re improvising, it’s wise to keep an abundancy of tracks in the library so we’re prepared for anything. Even without a residency to a club, I’ve already stacked in at 2,700 tracks collected this year alone."