People generally follow the rules of etiquette.

One unwritten rule is for guys doing power (weight) lifting who are grunting, yelling and screaming. Try not to make obnoxious sounds. Everybody knows you're here.

We've had instances of extremely bad (body) odor that would literally clear out a whole area of a room. If you are going to wear the same clothes over and over make sure you wash them.

When you're done with an exercise, clean up after yourself. If someone is sweating all over a piece of equipment and doesn't clean it, when another person gets on it it's covered in a puddle of sweat.