Washington has some of the highest rates for a hotel room in the U.S.: We'll point you to DC's Cheap Sleeps, from Dupont Circle's Windsor Inn (where rooms start at $89) to shared rooms (starting at $25) to private rooms (starting at $79) at Washington's Hostelling International Hostel, to house or apartment-swapping and other options. From Foggy Bottom's Bread and Chocolate to Georgetown's Old Glory Barbecue, the authors list dozens of places where...