So, I have figured: work at my own pace, working different muscles.
For example: right after I bench 8-10 reps, I then got to the ab machine, and then the back machine. Then repeat for 2 more complete sets (bench, ab, back).
It's getting 3 sets of three things without having to wait for much recovery. You can get a lot done this way. Just don't do the same routine everyday. Let the pecks, ab, and back muscles rest for ~48 hours while you work on something else (biceps, triceps, and shoulders). Add additional protein and time.
I does irk me when guys sit around the machines, talking, blah blah blah. Especially when the weightroom is so small, you can't afford to dominate a machine.
That varies. If you're going for size, slow the reps down. Slow and controlled, slow emphasis eccentric movement. If you're going for more strength/explosive strength, you want quicker concentric movement and de-emphasize the eccentric. If you lift heavy, you will only go as fast as the weight will allow you to lift and still maintain control.
Keep your body lean, your blood clean and your mind sharp. -Rollins