I live in Fort Greene and gleefully welcome a "burger joint" to our neighborhood.
I've visited 67 4 times since opening and never received anything less than smiling, stellar service...fresh, well-timed food...and decent prices.
Their Blue Burger (with my addition of caramelized onion) is that "hitting on all cylinders" combination - sweet onion, beefy richness, bacon smokiness, blue cheesy sharpness. Wow.
A regular denizen of Pomme Frites in Manhattan, I found that their cuts have changed but I love the double-fry taste/texture. 67 seems to have captured what PF has left behind.
And I have ventured outside the burger comfort zone to try their grilled cheese and was not disappointed - bread was *just* greasy enough, lots of yummy melted cheesiness, and ordered with bacon for the smoky, meaty kick.
Hmmm, may need to go back for a 5th turn for dinner tonight after shopping at Atlantic Center... :)