I carry a Ruger LCP in a Bulldog Blackberry holster on the belt. Everyone thinks it is a cell phone and pays no attention to it. You absolutely can not tell it is a gun.
Below is a picture of this holster "tucked" the clip is barely noticeable on a dark brown (or black) belt. I have been wearing it all day and no one said "hey what's that big ass clip on your belt?"