This may not be much help but I'd advise you to join another gym, there's no point going through the motions and slowing down reaching your goals because the gym doesn't have the facilities you really need or the staff to inspire, encourage and assist you to train in an effective and beneficial manner.
If you don't want to or can't change gym just do more reps until you can't manage any more and cut rest time between sets.
www.extremenutrition.co.uk
Musclechats discount supplier.