The (ungripped) 5DIII with the Shorty McForty and a wrist strap is the ultimate P&S. At first glance by a non-photographer, it just looks like a high-end P&S. The next time you're at a party, etc., and would otherwise reach for your iPhone, put it in green square mode and turn on live view. Maybe even pass it around the table. Nobody will realize that it's the reigning IQ / low light monster that it is until they see the prints.
If I were a wedding photographer, I'd definitely do some reception / dance shots like that, as an inconspicuous "guest" in the thick of things and just another random schmuck there with a camera.