No one has heard the saying, "A well dressed gentleman ALWAYS carries a knife." ??? I checked Barlett's Familiar Quotations and don't find it.
When I was in school we took our knives and spent a lot of time in Jr. High crafts classes having sharpening contests. No one got threatened by that. How schools have changed -- for the worse.
Anyway, I have a Kershaw lockback, stainless that is about 2" closed. It's carried in a leather coin purse along with a spare key and all my change.
My Gerber 2" lockback stainless with a black polymer grip is on a short loop of parachute cord along with my keys.
When I enter the courthouse or the Federal Building both the keys and the coin purse go in the "dish" as I pass through the metal detector. No one has ever commented on either knife. I don't even think about those two knives unless I need to sharpen a pencil, open a package, cut a cord.
Usually I carry some sort of "tactical" or "work" knife. The knife is ALWAYS available when I'm sleeping -- but then so are several handguns, a riot shotgun and a semi-auto assault rifle. The knife wouldn't be my first choice for defense. We have a concealed carry law here in Oregon. Most of the time I carry a .357 magnum snubby.
Machetes in the truck, a 30" and an 18" -- along with a folding Sven Saw. Is a Sven Saw a sort of serrated blade knife?
Sometimes when swimming I have a Gerber River Shorty.
No knife in the shower, but we live in a really sedate suburban neighborhood with virtually no crime. And the guns are just across the hall. (We have a shower curtain that we can see through, not planned, it just works out that way.)
Locker room . . . knife is in the locker.