We're playing Saturday night at a new venue, one we have not played before. The room is medium sized, long shaped rather than wide shaped, tiled ceiling and ceramic tiles on the floor, with no stage - we'll be set up on the tiles at the same level as the dance floor. The last time I played on a tile floor, our "stage" mix was horrible, and I attributed it to the tiles. We expect the dance floor to be busy. Anyone have any general advice on how to best approach sound for this type of room? We have a small 8-channel powered mixer that does about 300 watts at 4-Ohms - we normally run the mains through Channel A (so 4 Ohms there) and the stage monitors through Channel B (also 4 Ohms). One time at an outdoor gig, we rented a board, power amp and subwoofer, and powered the mains and sub off the poweramp, and the monitors off our powered mixer. Do you feel those additions will be needed here?