Local DJs David Epstein and Jonboy, veteran residents at Scottsdale's Next (7111 East Fifth Avenue), are celebrating the completion of their first demo CD together with a bash in Next's upstairs lounge on Saturday, August 7. The two DJs, collectively known as 4th Dimension, specialize in a mix they like to call "progressive loungin'" -- a dreamy blend of synth-heavy progressive breaks that's as conducive to sipping a scotch and bullshitting with friends as it is to getting up and dancing. In other words, it's dance music for adults, not pounding tracks for candy ravers. Jonboy likens 4th Dimension's style to a modern continuation of what Sasha and Digweed were doing six years ago -- and you gotta like the sound of that. Admission is $5 after 10 p.m.