Brick & Mortar (Cambridge, MA)
Finding a good bar within walking distance from work is always a welcome thing. Enter Brick and Mortar, an upstairs "speakeasy" next to Central Kitchen. The small space gets pretty busy even on weeknights.
The beer menu is pretty small since the focus is on cocktails. For a hot summer night, try tall drinks like the Red Duster Swizzle (Beefeater dry gin, Madeira, Campari, falernum, lime, and bitters). There are also classics like the ginger-y Mamie Taylor. Cocktails run about $12 and up.
For me personally, though, I wish they had a bigger menu for me to try out on multiple visits!