Another important thing to remember in colour photography, especially under artificial light, is that the colour balance my simply not be even across the entire scene. (or duration of the shoot.)
Some of the lighting you can find in old arenas for example are especially nasty, as they will not only colour cycle several times a second causing different colour balance levels, but the lights won't even be in sync with each other and the shifts will 'wander around' the scene from frame to frame.
Extra "Added Fun" may be found in some lighting gear that goes through noticeable
thermal cycling cycling. They'll heat up while they're on, begin to overheat, thermal throttle themselves back down, and then start the process over again, all the while throwing out a slightly different lighting. Their cycles can be a few seconds to several minutes long.
Some of the newer LED stuff isn't much better, as they'll use a low-frequency pulse width modulation rather than a high frequency to adjust the brightness and/or colour, which means weird flickering brightness/colour shifts from frame to frame/light to light. And since they're tied to their own internal clock cycle, you can't even reliably choose a shutter speed based on mains frequency to get around them.
In some cases you can play around with blending different colour balance exposures across the image, but in other's you're likely better off picking a single area and dialling that in with proper corrections while letting the rest of the image fall as it will.
Weird location lighting can make investing in high powered flash gear a very tempting venture.
Sitting down to review long duration bursts from my 7D, taken just to capture the lights shifting, has been a very interesting lesson in what is actually going in some venues.