I had the pleasure of seeing the Drowsy Chaperone in Los Angeles before it headed to Broadway and then once again upon its return. It is one of my favorite original musicals containing all of the fun of 42nd Street in a new story about The Man in the Chair with an acerbic view of musicals in the modern day compared to the silliness found in the old 20's and 30's musicals.
Machine weights also can be effective weight training tools, as long as you use machines that adjust to your body dimensions and allow your joints to move through their natural motion paths. Machine weights are generally safe when used with the proper technique.
When it comes to lifting weights or working with machine based equipment there are two different approaches. You can either focus on strength or focus on endurance training of the muscle. A strength focus is executed with more weight and less reps and, an endurance focus is executed with less weight and more reps. For example, take a simple bicep curl with free weights.