[RIKKI TIKKI]

Your directions of the layout are a little confusing... if I were to guess, I would say the stage & dance floor would be on the longest wall (North?), with a few tables and seating somewhere south of the stage, and maybe contacting the dance floor somewhere closer to where the bar sits on the other ( South? ) wall... Not knowing which model Eurolive speaker you are using ( or any other amplification available ) you are needing to get closest to dance floor for sound and bass control for the dancers, as well as having some sort of speaker/monitor for Singer's on stage, so that they & you can hear what the mix sounds like to enhance the sound for Karaoke... again, just guessing, until the other details are clarified!