Last year the club purchased a Spyder calibration system so that images shown on our projector were as accurate as possible. However, if your monitor at home isn't calibrated to the same levels your images could look very different.
Ideally, if you want to ensure that the image you see on your monitor at home looks the same as the image shown on our projector you should calibrate your screen. Left uncalibrated your images will probably look slightly different on our projector, and this may or may not effect how your photograph is judged. For a novice, you probably won't worry about slight differences, but if you've spent hours in Photoshop adjusting the colour balance of your image you'll want it to look as good as possible.
Using the Spyder system you can set up different colour profiles on your computer so that your screen is optimised for viewing images that will be projected in camera club competitions or so that your printed images match what you see on your monitor.
It costs £5 to hire the calibration system from the club and the funds will be used to cover the cost of buying the Spyder hardware and software.