We're not the easiest place to find. But it'll be worth it once you get here. At the intersection of Harrison and Waltham, look for the "Gaslight" restaurant (it was featured in the utterly forgettable Tom Cruise/Cameron Diaz movie Knight and Day you probably never watched). Walk past it confidently, keeping the Boston Sports Club to your right. Up ahead, you'll see a large brick factory building with the numbers "580" on it. That's your final destination. Head down the longish walkway/driveway to the front doors. Go up the steps, past the elevator and take a left. And just like that, you'll be here.