An interesting article at RA for those who have yet to grasp the job of warm-up DJs!

But there is more to opening a room than just keeping the tempo under 124 bpm and playing deep music. The signature of a great opener is defined by a devotion to the music he or she is playing. As Lawler explains, "you can tell when an opener is someone that has just gone onto Beatport's Top 100 [to buy their] Deep House [tracks] and is trying to do it, as opposed to someone who loves and collects the music they are playing. You can always hear passion in a DJ's set."