ok, here's what i know (not very much really)
lizard lounge: breaks (probably my favorite)
decibel: jungle, D&B (very raveish)
sand bar: jungle, D&B (small, intimate. dance floor on the rooftop in deep ellum)
the wall: trance (kinda european-ish)
pulse: house/trance (again, raveish)
of course, this might vary a little bit due to christmas events and such.
there's some more that i can't think of right now, but i hope this gets you pointed in the right direction. i would definitely follow Rolex's advice and grab an observer.