Loneavenger... so to make sure I understand, you actually do not point the lasers at the dancefloor, but rather up the ceiling all the time?
Majority of the time, every now and then we let it fill the room, but with the lasers you really want to remember to never point Lasers down where the lense is aimed into someone's eyes. Just shoot it straight out and let the beams fill the room on their own. I love the effect on the ceiling, it's only a matter of personal preference but at a lot of teen events i just let it fill the room.