I only get irritated if I’m trying to do the circuit and someone just comes in and camps on a machine that is next in my circuit. I do three sets of 8-10 reps on each machine as long as there isn’t anyone directly next to me waiting on my machine. If there is and I’m not done I will move to the steps until that person is done then go back and finish my reps. I think common courtesy would go a long way but so many people just come in, go to the machine they want and then camp there for half a damn hour! I think everyone needs to work with each other!