The Granite Club is located post security within Manchester Boston Regional Airport - near Gate 4. It's an Airport-run travelers lounge.
The Granite Club travelers lounge is for folks who have a membership in other Airlines club/lounge programs - such as United Club.
It's a bit odd, there is no one manning a desk to admit folks in. Instead, you pick up a phone on the wall by the door and it allegedly rings somewhere in the Airport back in the administrative offices. The person on the other end will then give you a code to enter into the keypad, which will unlock the door.
You enter into a small room with three black cushy chairs and two matching couches, a table with four chairs, a printer, a flat screen HD TV and a vending machine.
Down a short hallway is a restroom, a coffee station, and several isolated workstations.
It's small, clean, and quiet - I was the only one in the Club during my visit.