Would it be possible to start listing who is DJing and what style of music they're think of playing on the show listings? I can't speak for everyone, but I know for me, someone playing music as I stand there waiting for a band to come on is 90% of my reason in attending a concert. I can't tell you how many times I've been in the middle of a band's set and wished that they would stop so that I could stand there awkwardly as someone played piped in music over the sound system.
Knowing who was DJing would definitely help me to be a smarter consumer and purchase more tickets to your fine venue.
