1. The super-jazzy elderly person.
2. The person who might as well live at the gym.
3. The newbie who can't seem to figure out any of the machines.
4. The one taking REALLY LOUD PHONE CALLS on the treadmill.
5. The one who's waaaaaaaaaay sweaty.
6. The Yoga Army.
7. The guy who skipped leg day. Every leg day.
8. The one who think 15 minutes on the treadmill will justify the XL Peanut Butter Blast Smoothie with chocolate chips he just ordered from the smoothie bar.
9. The creeper.
10. The people taking selfies.
Gym accessories: A smartphone and extensive knowledge of which Instagram filter is most flattering depending on the time of day.