Studies show that today’s 20-somethings represent the first American generation to prefer tea and coffee equally. So expect to see many more places like Gen Sou En, the area’s first modern Japanese teahouse. Brookline’s all-day operation serves fab breakfast sandwiches, bento boxes and baked goods, and comes from Japan’s 100-year-old Harada Tea Company. The owners smartly tapped credible and cool locals to lead its first cafe—like Backbar cocktail sensei Sam Treadway, here tackling top-shelf green and black tea.