We are adults, so it's time we wore clothes that actually fit us. If it's too small, stop trying to squeeze into it. And if it's too big, go to a tailor and get it fitted. Look good, feel good, wear clothes that are your size, por favor.
If you hate your friend's boyfriend, too bad. If she asks your opinion, keep it as neutral as you possibly can. Be Switzerland. In the end, she is going to do what she wants, so unless he is hurting her, stay out of it. The good news is, you don't have to date him.
There is a special place in hell for people who don't wipe down their equipment at the gym. Seriously. Don't ruin the experience for everyone. Going to the gym is hard enough as it is. Wipe down your equipment. It takes two seconds and you are an animal if you don't.
15. Don’t Take The Seat/Urinal/Treadmill Right Next To Someone Else
If there is a row of empty seats, why would you take the seat next to the only other person in the row? The same goes for urinals and treadmills. Don't be a creeper and please give people the space they need.