Long time reader, first time poster..

Sorry if this is an old idea, but I came up with an idea for a way to expand the public knowledge of bitcoins the other day. What if we could start tipping in bitcoins?  i'm not talking leave the whole thing, but for a $4 tip, just leave $3 in cash, and 0.5 (or whatever the current rate is) in btc? Maybe a paper card of some sort that has a link to a website where they can claim their coins, but first they have to learn about it. They get their first btc, start talking to other waitstaff, etc..

Maybe they get only get one, think it's just a gimmick and don't really care to cash it, but at least it gets the word out.

Or maybe you leave 0.5 every day for a month and eventually they realize what value they have.

Thoughts?