IMO you become a far more precise dj in headphones.. Club accustics and so many variables can cover up a large amount of things headphones can’t. I mix entirely in headphones at home especially when wife and kid around when not I have studio monitors and I keep a cue/mix running properly through headphones and usually keep one cup on ear… When in a club environment I only use them a little far less then when at home but still do usually one cup as well
The way I look at it, the mix will ALWAYS sound better in headphones.
I’ve never really considered eq’ing the actual DJ mix to suit the room. That’s for the sound engineer (or the guy who maintains the PA system) to worry about. But considering the incoming track, the out going track AND the room when DJ’ing? That sonds like a lot to deal with… At least until you’ve played the place a few times and have an idea of the sound of the room.
I always used the difference in sound in headphones and on the dance floor as a kind of margin for error - if it sounds good in the headphones, it’ll sound fine on the floor.
Do you have sound engineers in Bristol? 
Not while the DJ’s playing - I suppose I meant the guy that puts the big ol’ sticker on the board that says “DO NOT CHANGE THE LEVELS!!!” 
Ahhh haha 
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In my experience, tbh, it doesn’t matter how good the sound system is in a club, the acoustic profile of the room is always completely and utterly different from your headphones. I used to just use the headphones while beatmatching; nowadays, the only time I put them on is when I’m playing a new track I haven’t already played a hundred times before.
Wait… You use SYNC??? 
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Only joking, man!
Ahaha 
You already know my justification for it !
That goes without saying. But the DJ is supposed to EQ the tracks into one another, not EQ to the room environment.
I find headphones invaluble for balancing levels and EQing, especially if layering tracks. You might find your mixes improve if you monitor things properly through headphones as others have said already.
EQing with the room environment, you’re still EQing the tracks together. You’re just factoring in the effect the acoustics of the room have on the tracks.
Don’t see how EQing in headphones is more accurate for the setting. Maybe in a recorded mix the headphones may be more accurate but not necessarily in the club.
Unless you’re mixing in the sweet spot of the room (does that even exist in clubs?), the sound through your headphones will always be much flatter and more accurate than anything you hear through the speakers. The sound quality will be unquestionably better through decent headphones.
Eqing to the room usually means crank up the bass a little, if it’s too low for the system.
i wonder if I don’t know about some supersecret awesome DJ technique or you’re just overthinking stuff
It doesn’t exist, no, but the first time you play in a new venue, you can stick a track on and walk around the place; essentially, you’re putting together a mental map of how the sound changes in the space depending on proximity to speakers, angles of the walls, height of the ceiling, etc etc. You then go back to the booth, make adjustments, and take another walk. Repeat this process a couple of times and you should be able to work out roughly what every other area in the club sounds like in relation to your spot in the booth.
Surely I can’t be the only one who does this? :-\
I almost understand what you’re saying.
But the properties of the room will change relative to how many people are in there… You can’t go for a wander every time a few more people come into the room.
I almost understand what you’re saying.
But the properties of the room will change relative to how many people are in there… You can’t go for a wander every time a few more people come into the room.
I do this sometimes, but with the amps rather than the mixer to get the right balance between the subs and the tops.
Lucky 
Most of the venues I’ve played at have the amps in the manager’s office or the cellar, presumably to stop people screwing with them haha. I wouldn’t mind so much if they were configured properly, but they’re usually not.