Pinnacle
Pinnacle, officially Pinnacle Gourmet serves snacks like pizza, sandwiches, and bagels. It is located on Broadway at 116th St.
Good location. Crap seating. More or less always open.
During the subway strike of 2005 Pinnacle's owners forced its outer borough-dwelling employees to sleep in the store, lest they fail to show up the next day.
Map
<googlemap lat="40.807313" lon="-73.964735" type="map" zoom="16" width="500" height="300" controls="small"> 40.807313, -73.964735, Pinnacle (snacks) </googlemap>