The smell of old sweat or unwashed clothes is something that I find hard to be around. I go to the gym a lot and there are a few people there who seem to not change their clothes after a workout and just reuse them the next session.
That sour, cloying smell just makes me feel that they are rubbing their rotting, unwashed skin all over the machines so I have to give them an extra thorough clean before using, and if they are nearby then I have to walk away.
Then there are some that are clearly ineffective at wiping after going to the bathroom so the smell of poo around them is unbearable and I have to go to another area of the gym altogether.
I appreciate that some people may have medical issues that cause this but the impact on me is such that I have to remove myself from their vicinity.
As for the smell of chips, BBQ etc - I love it. Where I live there are often small stalls cooking skewers of meat in the evenings and they taste awesome and the vendors know that wafting the smell around drums up custom.
