There's this guy who sticks these things up all over Paris, it's amazing - you find them everywhere! He's offering free English lessons through his web site and it seems to be quite good, if that's what you're in need of. It makes a change from Chinese massages and piano lessons, which seem to be the other most popular ads, along with notices about obscure bands' latest albums which you are never going to buy in a million years. Good luck to the free English guy, that's what I say...