Acai berry? [lisp] That's, like, soooo five minutes ago! [/lisp]
Seriously, there are better things to promote. Treat offline marketing like online, meaning think niche and target marketing. Random flyers at bus stops and grocery stores are a waste of time. Get an offer for some type of niche product and put up flyers somewhere where people will care about it, if you're gonna go this route. (Ex: somebody mentioned payday loans, try something like this by the pawn shops, OTB's, unemployment offices, etc.)