Easy C. Even if you're not religious, church is one of the best places to talk philosophy, as it's one of the few places you'll find trained philosophers/theologians (I assume this question allows you to choose your church). And really, taking an hour off each week to learn more about the people in your community and the religious ideology that grounds Western civilization seems like a sensible investment.
Unsurprising number of hipster answers here, though!
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West of the brick. ~*Rockets Fan*~
Epic SA-X: http://www.youtube.com/watch?v=QI89FfIEYU4