You dont want to fog up the place so much you cant see your hand in front of you! You just want enought so you can see the beams of light. Actually, i like it when the audience doesnt know the fog is coming out. Remember, its just to aid the lights in their effects and not to be its own effect... so i feel.
The blacklights give a good room fill, and you might want to keep them on. I would kick em in when you want to start the "actual dancing" and want to kick up the party.
Use the strobe sparigly. (they can get annoying. i did a party this weekend where 2 small pinspot strobes were part of the decorations. they blicked all night, it it just made see everything harder, and ruined my slow sets. Or at least to my trained eye it ruined them )