Color Saturation and Hue are good. Colors work well here. Brightness and contrast: There are a couple of spots that are blown-out, the neck and cheeks near the nose of (I assume, the puffy one to be) Triple Bypass. The elbow of Gil,is approaching the same point. The wall between them, where I expect it is the reflection of the flash, is also going the bitter edge before it burns out.
I like the post processing here. Gives the picture a nice feel. As others have noted, cropping a bit down from the top would have removed a distracting element.
I also like the way the heads are tilted in unison. It makes it look a little more posed, and less snap-shot-ish.
The technicians in the crowd would have graded you down for centering your subject. But I can see this on a promo poster for these guys.
The harsh post-processing on my initial look kinda' rubbed me the wrong way, but after letting the mood flow out of the shot, find it to work for, not against the image. Only suggestion I have would be to crop in a bit closer so the cords & such above don't compete as a focal point.