SIghtglass has five San Francisco locations, but the most impressive of the bunch is its flagship on 7th Street in SoMa. The space doubles as the production roastery and company headquarters. There, knowledgeable baristas host free public cuppings (that’s tastings, to the uninitiated) at the in-the-round open coffee bar. In addition, the spot offers regular brewing classes for burgeoning coffee buffs. Upstairs on the mezzanine level, you’ll find an Affogato Bar, where you can customize your cup to your desired sweetness. Coffees are sourced from around the world, and the cafe offers espresso drinks, pour-over, and cold brew on tap.