It’s not a microroaster or coffee-bean think tank, but Either/Or percolates with fresh energy—every inch, every sip of this Scandinavia-meets-vintage coffee shop is considered. Owner Ro Tam ferrets out fine roasters for artful lattes while crafting seasonal sodas like grapefruit and honey with cracked black peppercorn and a float of pomegranate seeds. Espresso flights include a daily “taste pairing”; recently it came in the form of shaved ice, papaya spears, and orange blossom water. The house Tanglewood Chai is the big find, hot or cold, reverberating cinnamon and rippling with fresh ginger. Tam, wisely, has bottled it.