What do you do if the machine you need, for example Squat rack for squats or the pully machine for lats (sorry I dont actually know the name), is taken and you are following NROLFW and only trying to rest for no more than 60 sec between sets? Especially if you doing your alternating sets?
My gym has one of everything and Ive already done two workouts and ran into this problem.
Sometimes I have to do some of the exercises at home if I can't get into a certain area of the gym (for example when a class is going on and I can't get to the steps in the closet for the step-ups).
Putting in 5-10 minutes on a cardio machine just to keep your heart rate elevated while you wait probably is a good option also.
Just remain flexible and make the best of each situation.