edmidlifecrisis
Registered mediocre bass player
One solution I have found is the Kel-Tec .380. Granted, this is not my first or second caliber of choice but it beats the heck out of a rock in a nasty situation and is un-noticable in your jeans back pocket. (horrible trigger pull)
Second that- Warm s Florida is also concealment challenge. Ruger now makes a clone of that Kel-Tec pistol, the LCP. Both very flat and easy to conceal in a wallet-like holster in front or back pocket. Trigger pull is not great, sights are worse. But yes, better than a rock!
Another recommendation that works well for some people.
www.smartcarry.com
Takes practice to access and bring into use. But can be done.
For the 642 the DeSantis Nemesis pocket holster in front pocket of loose cargo shorts is a good choice.