Shot a club event last night. Wow, that was tough. No light and no bounce options, and inconsistent flash as a result. In the end, I used:

1Ds MkIII, 1600 ISO, f/1.4, 1/30th, Lightsphere

That is:

• 1600 ISO
• f/1.4
• 1/30th second

That finally gave me the light I wanted. Without the 35mm f/1.4L lens I would have been dead in the water. The other shooters were having to aim their flashes straight at their subjects.. brrr.

Biggest problem all night by far: I could not see any of the controls on my camera. That is how dark it was. Rule of thumb: if you cannot see the camera controls, pictures will be difficult.