For some people, the thought of using weights in the gym is a real turn-off, whereas for others it is an effective way to exercise and fashionable right now. For those gym-goers who fall into the former group, however, exercising regularly with weights can be a repetitive and cumbersome way to workout.
Everyone should exercise in the way that works for them and which takes into account their strengths and needs. For anyone who wants to include resistance training in their workouts, using cables or machines rather than weights is a great alternative and can have similar results. Using cables and machines can also be mentally engaging and allow for flexibility when exercising.
In this vein, I recommend this article from Men's Health on the Cable Fly exercise and how using cables can deliver a great chest workout to the level of resistance required. Just be careful with the technique used and posture, however, to avoid injury or causing undue strain to the neck!