Now you have your first appearance. It is best to arrive an hour earlier. So you can check out your sound and get rid of difficulties. In every club there is the master boxing in every corner, running over the master, then bass right in front of the dance floor and Booth they are next to the DJ, as in tomorrowland, to the left and right of the DJ. Sound check at the beginning and in between are one of the most important tasks you have to do. With DDJ RB you can only connect your mixer via cinch. Red white in master Red white pure and you can listen to it via cue before you turn the master loudly on your mixer. Turn it up and go around on the dance floor and hear the sound whether it's too loud or soft, with a lot of bass or too little. Open rekordbox setting and go to audio and set the master and booth properly. It depends on the space and the quality of the speakers how loud you can make them but not overdrive loudly so that your ears hurt. try from 0DB, -6DB, -9DB or -12DB. You can dampen it so that it is still loud but not too much bass. You can decide that yourself with the organizer or a technician will come and you will do it together. With the DDJ 1000 controller, you can connect the club's system directly to your master via XLR and connect the booth boxes via jacks. With the DDJ 1000 Controller you can regulate the booth and master yourself. But it shouldn't be 100% loud from the start. You build up the evening to 50% at the beginning and increase the volume later when it gets busier. Go back briefly to the dance floor and check the sound whether it is optimal later you can assess it better. have fun with your performance.