I'm in academia; specifically I'm a post-doc working on computational linguistics. So I mostly have contact with PhD students and other academics. PhD students are poor, but that can actually be a good thing here. It means you can convince them that they ought to donate later, while they spend four years or so learning to live on little money. Then they go off and work at Google, or some such.

I do plan to start talking about my tithing, slowly, as it comes up in conversation. If everybody who decided to give rationally influenced at least one other person to do so too, the idea grows virally. But, gently, gently. Nobody's convinced by brow-beating moralising.