Ah, the rich caramels. The hints of chocolate, the earthy aromas and the lingering taste of exploited labor. As so many addicted Houstonians know, a good cup of coffee can be a lifesaver. But what about the extreme poverty suffered by plantation pickers? FairTrade labeling organizations and the high-minded folks at Taft Street Coffee want your cup of joe to be guilt-free. Serving only FairTrade, organic coffees roasted right here in Houston by Katz Coffee, Taft Street is putting its business principles where its mission-oriented mouth is. And the beans aren’t suffering for the distinction. Deeply satisfying strains of Guatemalan, Sumatran and blended coffees are yours for the picking at $11 per pound — without that guilty aftertaste.