There is some small ideas and big ideas to enforce BTC, though. We already gave Bitcointip in Haikko, and I am likely extending it to Punavuori (an area in the center part of Helsinki where about 5000-10000 people live). We will dole out free millibitcoins as bills, and inform all the restaurants there that if they serve their clients well, they will receive tips (because tips are already there in the hands of their clientele - we have give them out for free to all the inhabitants

)
Then the restaurants can cash them in for euros, or redeem them for actual bitcoins. Or keep them in circulation as bitcoin-denominated change.
My idea is to start with 5, 10, 20 so very small notes that we give out for free and prepare that many do not care. But some will, and that's going to be fun

You gave away notes worth 5-20 Euro to 5,000-10,000 people?
That's a 75,000 Euro giveaway, right?
I don't see this helping Bitcoin as the notes can be readily converted into fiat. Only people already interested in Bitcoin will see the notes as BTC.