Warmup

A warmup set — also called an opening set — is the first DJ slot of a night, played before the peak-time and headline artists. Despite the name, the warmup DJ's job is not "to play smaller tracks" or "to fill time before the real DJ arrives." It is a distinct craft with its own rules, and an experienced warmup DJ is a separately respected specialist within the booking ecosystem rather than an undersized version of a headliner. The core job is to ease the early crowd into the room, build the floor gradually from lower-energy material, and leave the audience and the next DJ in exactly the right place for the energy to climb further. The widely-cited rule of thumb in the literature — including in Bill Brewster and Frank Broughton's How to DJ Right and across two decades of subsequent DJ writing — is that a good warmup should bring the room to roughly 6 or 7 out of 10 by the end of the slot. Lower than that and the headliner has to spend the first twenty minutes of their set doing warmup work that should already be done; higher than that and there is nowhere left for the headliner to take the room. The cardinal sins of the role are mirror-image failures: a DJ who plays too softly and leaves the floor under-built, and a DJ who plays too aggressively, drops anthems, and steals the moment from the headline act. Track selection during a warmup tends to lean on deeper, more atmospheric, more progressive material than the rest of the night. In trance contexts, a warmup will typically work with progressive-trance and Anjunadeep-style records at 124–130 BPM, withholding the 138 BPM uplifting catalogue and the named anthems until the main DJ takes over. Tempo, key, and energy all rise gradually across the slot, and the final fifteen to twenty minutes are usually shaped specifically to hand off to the next DJ at a tempo and intensity they have indicated. Etiquette also matters off the decks. Warmup DJs do not play the headliner's biggest tracks (those are slotted into the headliner's planned set), do not play the obvious anthems of the genre regardless of provenance, and do not push their own peak material in front of an audience that is not ready for it. Headliners frequently thank their warmup DJs by name during their own sets, because they know a properly executed warmup makes their entire performance significantly easier to land — and a botched warmup makes it nearly impossible to recover.