Below is information on bed and breakfast places and hotels in the D.C. area. We recommend choosing a location close to a Metro stop or a hotel that provides a shuttle to a Metro stop. (Most events will occur at venues close to downtown Metro stops on the combined Blue/Orange/Silver lines.)
Also definitely worth checking is Airbnb: https://www.airbnb.com/locations/washington-dc (especially for the Dupont Circle, Woodley Park, Downtown/PennQuarter, Foggy Bottom, Southwest Waterfront areas).
Also VRBO: https://www.vrbo.com/vacation-rentals/usa/district-of-columbia-dc
BED AND BREAKFAST PLACES:
(note: the website, despite its name, includes listings for b&b locations outside of D.C.)
Many are in the Dupont Circle / Woodley Park area along the Red line. See, for example,
Dupont Collection http://www.thedupontcollection.com/about.php
D.C. Inns http://www.dcinns.com/
Kalorama Guest House http://kaloramaguesthouse.com/
For each of the hotels listed below, be sure to check the website for any special rates or package offers.
The only hotel in the immediate vicinity of the Library of Congress is the Capitol Hill Hotel on the Blue/Orange/Silver lines.
Capitol Hill Hotel – 200 C St. SE http://www.capitolhillhotel-dc.com/hotel-suites-in-washington-dc/
See also: http://www.capitolhillhotel-dc.com/washington-dc-hotel-deals/
Within walking distance are hotels in the L’Enfant Plaza and Union Station areas, such as the following:
L’Enfant Plaza or Federal Center Southwest (Blue/Orange/Silver, plus transfers to/from Yellow/Green Metro lines at L’Enfant Plaza)
Holiday Inn Capitol -- 550 C St. SW http://www.hicapitoldc.com/
Hyatt Place National Mall – 400 E St. SW http://dcnationalmall.place.hyatt.com/en/hotel/home.html
Residence Inn – 333 E St. SW http://www.marriott.com/hotels/travel/wascp-residence-inn-washington-dc-...
Union Station area (walking distance to Library – on Red line)
Hyatt Regency – 400 New Jersey Ave. NW http://washingtondc.regency.hyatt.com/en/hotel/home.html
Liaison Capitol Hill – 415 New Jersey Ave. NW http://www.jdvhotels.com/hotels/washington-dc/washington-dc-hotels/the-l...
Washington Court Hotel – 525 New Jersey Ave. NW http://www.washingtoncourthotel.com/
Phoenix Park – 520 North Capitol Ave. NW http://www.phoenixparkhotel.com/location-and-map.htm
Also a bit further north:
Hilton Garden Inn (between Union Station and NoMa Metro stops on the Red line)
White House area
Holiday Inn, 1501 Rhode Island Ave. NW http://www.inndc.com/
(Farragut North / Dupont Circle Metro stops on the Red Line)
Hampton Inn, 1729 H St. NW (Farragut West Metro stop on Blue/Orange/Silver lines) http://hamptoninn3.hilton.com/en/hotels/district-of-columbia/hampton-inn...
Foggy Bottom area (Blue/Orange/Silver Lines)
River Inn http://www.theriverinn.com/?utm_source=google&utm_medium=places&utm_camp...
George Washington University Inn http://www.gwuinn.com/
Melrose Georgetown http://www.melrosehoteldc.com/?utm_source=google&utm_medium=places&utm_c...
There are many hotels as well as bed and breakfast places in some neighborhoods that are near Metro stops where the rates might be substantially less, at least in some seasons. This is often the case for the hotels in the Crystal City, Pentagon City, and Rosslyn areas of Northern Virginia. We therefore are listing some likely ones, and you will be able to find additional ones and compare prices by using TripAdvisor (https://www.tripadvisor.com/Hotels-g28970-Washington_DC_District_of_Colu...) or Trivago (http://www.trivago.com/washington-dc-35126/hotel) and similar websites. (You can generally search accommodations by neighborhood.)
Crystal City / Pentagon City (near National Airport, on the Blue and Yellow lines – generally faster to take the Yellow line to L’Enfant Plaza, then go down to the platform for the Blue/Orange/Silver lines to take a Metro train two stops to Capitol South)
Westin Crystal City http://www.westincrystalcity.com/
Sheraton Pentagon City http://www.starwoodhotels.com/sheraton/property/overview/index.html?prop...
Embassy Suites by Hilton Crystal City http://embassysuites3.hilton.com/en/hotels/virginia/embassy-suites-by-hi...
DoubleTree by Hilton Crystal City http://doubletree3.hilton.com/en/hotels/virginia/doubletree-by-hilton-ho...
Westin Arlington Gateway http://www.westinarlingtongateway.com/
Hampton Inn & Suites Reagan National Airport http://hamptoninn3.hilton.com/en/hotels/virginia/hampton-inn-and-suites-...
Holiday Inn Rosslyn @ Key Bridge (one block to Rosslyn stop on Blue/Orange/Silver Metro lines)