Those rare gyms dedicated to male-only body building and exercise offer the best opportunities for looking up shorts. Sadly, in the post-feminist age, they are largely gone. I think men are simply less uptight about being seen by other men, whether intentionally or unintentionally, than they are when a woman might be around to see. I suppose there is the legal aspect: I have never heard of a man complaining to the police because he saw another man's unintentionally exposed penis or scrotum...women on the other hand...!
In a guys' only joint sexual preferences seem of little consequence, I have noticed men known to be homo-, hetero-, and bi-sexual, as well as the indifferent, less concerned if their gear falls out during a bench press or squat. In fact, it seemed that good natured teasing sometimes followed it.
Now, most of us are faced with gyms that cater to feminine sensitivities even though the (super) majority of members are male. What a waste of space and equipment...not to mention the demoralizing impact of watching obese women's flabby boobs and bellies jiggling all over. Of course this really kills my appetite for a few days, perhaps this is a secret fat