I've had my PA for about six years, I'm 35 now. Here in Louisville, KY its far more rare than SF or Miami/FTL. At the Y downtown I never walk around the locker room covered up. But the best part is the steam room, when I have to lift up my balls and junk toe sit down and I drop them so that the PA clangs hard against the seat. When I was still in the Army and doing the same in the saunas at the on-post gym, no one ever commented. I witnessed one Soldier get lectured hardcore by some senior NCO for having his nipples pierced as all piercing were against AR 670-1. But no one there ever commented on my PA since they didn't want to admit to staring at my cock.
At the Y and other civilian gyms I've had plenty of comments. About a year after I got my cock pierced, on a day when the sauna was packed full and everyone was silent, the middle-aged straight man across from me said out loud, "Dude there's a ring in your cockhead. That must've fucking hurt." I still chuckle. If I didn't want guys to stare at it, I wouldn't have gotten it.