DJ's are not EVER trying to tell the audience 'Look! I'm playing SOME of this..."

But imagine a DJ that turns up, hits 'Play', and then goes to the bar for three hours while the laptop plays his playlist... think he'll ever get a call back?

I am responding to the FACT that, when it comes to solo acts, guitarists out-gig arranger players at least 20-1 (much higher in my area). If you ever wondered why, here it is. Don't shoot the messenger. And if you can't figure out why a venue that can only afford one person prefers a DJ to a karaoke singer (playing a few chords on an arranger), I can't really help you.