Actually something like that was my tactic to get a few friends to start checking out bitcoin, going to a restaurant and me coming out and saying oh damn i left my wallet at home but of course knowing the restaurant does take bitcoin so i pull out my phone and paid with my bitcoin wallet, it pretty much blows their minds.
lol I would love to try that on my more skeptical friends. too bad there's currently zero restaurant (or anything) that accepts bitcoin as a payment in my town.