Things I shouldn't have to tell you, Vol. 1:
1. Please don't wear just a sports bra at the gym. Refer to locker room etiquette - this is a public place. If you have a great body, I'm distracted. If you have a gross body, I'm still distracted, but more so in a car-crash kind of way. *The only exception to this rule is if you're a "Real Housewife" - if I paid that much for my body, I'd probably want to show it off too. Plus, they're usually not in a public gym - it's just them, their trainer and a national viewing audience.
2. Conversely, please don't work out with just a tee shirt and no sports bra. No matter what your cup size, it's gross.
3. Wear deodorant. That's mostly to you men. Enough said.
As far as I'm concerned the gym should be like a restaurant at the beach:
No shirt. No shoes. No service.
Don't make me tell you again.