You've gotta love a place that still calls its burger a "hamburger sandwich." But the appeal of the hamburger at Original Joe's doesn't stop at the old-fashioned vernacular. In an era of fully loaded burgers, this is a simple creation: A thick, juicy patty is sandwiched between two halves of buttered, toasted Italian sourdough bread, along with some grilled onions and cheese, if you so choose. The fact that the burger has been made the same way since the restaurant opened in 1937 just makes it that much more appealing. Sit in one of the booths in the dark, clubby, wood-paneled dining room, nurse a $6 house martini or Manhattan, and time-travel to the days of Mad Men. If you're not feeling particularly noir, the front room has large windows that overlook Washington Square Park.